Initialize debugfs_entry to its semi-magical -ENOENT value when the VM
is created. KVM's teardown when VM creation fails is kludgy and calls
kvm_uevent_notify_change() and kvm_destroy_vm_debugfs() even if KVM never
attempted kvm_create_vm_debugfs(). Because debugfs_entry is zero
initialized, the IS_ERR() checks pass and KVM derefs a NULL pointer.
BUG: kernel NULL pointer dereference, address: 0000000000000018
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 1068b1067 P4D 1068b1067 PUD 1068b0067 PMD 0
Oops: 0000 [#1] SMP
CPU: 0 PID: 871 Comm: repro Not tainted 5.18.0-rc1+ #825
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015
RIP: 0010:__dentry_path+0x7b/0x130
Call Trace:
<TASK>
dentry_path_raw+0x42/0x70
kvm_uevent_notify_change.part.0+0x10c/0x200 [kvm]
kvm_put_kvm+0x63/0x2b0 [kvm]
kvm_dev_ioctl+0x43a/0x920 [kvm]
__x64_sys_ioctl+0x83/0xb0
do_syscall_64+0x31/0x50
entry_SYSCALL_64_after_hwframe+0x44/0xae
</TASK>
Modules linked in: kvm_intel kvm irqbypass
Fixes: a44a4cc1c9 ("KVM: Don't create VM debugfs files outside of the VM directory")
Cc: stable@vger.kernel.org
Cc: Marc Zyngier <maz@kernel.org>
Cc: Oliver Upton <oupton@google.com>
Reported-by: syzbot+df6fbbd2ee39f21289ef@syzkaller.appspotmail.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Oliver Upton <oupton@google.com>
Message-Id: <20220415004622.2207751-1-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Add wrappers to acquire/release KVM's SRCU lock when stashing the index
in vcpu->src_idx, along with rudimentary detection of illegal usage,
e.g. re-acquiring SRCU and thus overwriting vcpu->src_idx. Because the
SRCU index is (currently) either 0 or 1, illegal nesting bugs can go
unnoticed for quite some time and only cause problems when the nested
lock happens to get a different index.
Wrap the WARNs in PROVE_RCU=y, and make them ONCE, otherwise KVM will
likely yell so loudly that it will bring the kernel to its knees.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Tested-by: Fabiano Rosas <farosas@linux.ibm.com>
Message-Id: <20220415004343.2203171-4-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Use the generic kvm_vcpu's srcu_idx instead of using an indentical field
in RISC-V's version of kvm_vcpu_arch. Generic KVM very intentionally
does not touch vcpu->srcu_idx, i.e. there's zero chance of running afoul
of common code.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220415004343.2203171-3-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Don't re-acquire SRCU in complete_emulated_io() now that KVM acquires the
lock in kvm_arch_vcpu_ioctl_run(). More importantly, don't overwrite
vcpu->srcu_idx. If the index acquired by complete_emulated_io() differs
from the one acquired by kvm_arch_vcpu_ioctl_run(), KVM will effectively
leak a lock and hang if/when synchronize_srcu() is invoked for the
relevant grace period.
Fixes: 8d25b7beca ("KVM: x86: pull kvm->srcu read-side to kvm_arch_vcpu_ioctl_run")
Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20220415004343.2203171-2-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
If the PHY controller node has a "port" dwc3 tries to find an
extcon device even when "usb-role-switch" is present. This happens
because dwc3_get_extcon() sees that "port" node and then calls
extcon_find_edev_by_node() which will always return EPROBE_DEFER
in that case.
On the other hand, even if an extcon was present and dwc3_get_extcon()
was successful it would still be ignored in favor of "usb-role-switch".
Let's just first check if "usb-role-switch" is configured in the device
tree and directly use it instead and only try to look for an extcon
device otherwise.
Fixes: 8a0a137997 ("usb: dwc3: Registering a role switch in the DRD code.")
Cc: stable <stable@kernel.org>
Signed-off-by: Sven Peter <sven@svenpeter.dev>
Link: https://lore.kernel.org/r/20220411155300.9766-1-sven@svenpeter.dev
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The current driver logic checks against 0 to determine whether the
periodic tx/rx threshold settings are set, but we may get bogus values
from uninitialized variables if no device property is set. Properly
default these variables to 0.
Fixes: 938a5ad1d3 ("usb: dwc3: Check for ESS TX/RX threshold config")
Cc: <stable@vger.kernel.org>
Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/cccfce990b11b730b0dae42f9d217dc6fb988c90.1649727139.git.Thinh.Nguyen@synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Issue description:
When an OTG port has been switched to device role and then switch back
to host role again, the USB 3.0 Host (XHCI) will not be able to detect
"plug in event of a connected USB 2.0/1.0 ((Highspeed and Fullspeed)
devices until system reboot.
Root cause and Solution:
There is a condition checking flag "ssusb->otg_switch.is_u3_drd" in
toggle_opstate(). At the end of role switch procedure, toggle_opstate()
will be called to set DC_SESSION and SOFT_CONN bit. If "is_u3_drd" was
set and switched the role to USB host 3.0, bit DC_SESSION and SOFT_CONN
will be skipped hence caused the port cannot detect connected USB 2.0
(Highspeed and Fullspeed) devices. Simply remove the condition check to
solve this issue.
Fixes: d0ed062a8b ("usb: mtu3: dual-role mode support")
Cc: stable@vger.kernel.org
Tested-by: Fabien Parent <fparent@baylibre.com>
Reviewed-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Macpaul Lin <macpaul.lin@mediatek.com>
Signed-off-by: Tainping Fang <tianping.fang@mediatek.com>
Link: https://lore.kernel.org/r/20220419081245.21015-1-macpaul.lin@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alderlake has two XHCI controllers with PCI IDs 0x461e and 0x51ed. We
had previously added the quirk to default enable runtime PM for 0x461e,
now add it for 0x51ed as well.
Signed-off-by: Evan Green <evgreen@chromium.org>
Cc: stable <stable@kernel.org>
Link: https://lore.kernel.org/r/20220408114225.1.Ibcff6b86ed4eacfe4c4bc89c90e18416f3900a3e@changeid
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Commit 33fb697ec7 ("usb: dwc3: Get clocks individually") moved from
the clk_bulk api to individual clocks, following the snps,dwc3.yaml
dt-binding for clock names.
Unfortunately the rk3328 (and upcoming rk356x support) use the
rockchip,dwc3.yaml which has different clock names, which are common on
devices using the glue layer.
The rk3328 does not use a glue layer, but attaches directly to the dwc3
core driver.
The offending patch series failed to account for this, thus dwc3 was
broken on rk3328.
To retain backwards compatibility with rk3328 device trees we must also
check for the alternate clock names.
Fixes: 33fb697ec7 ("usb: dwc3: Get clocks individually")
Reported-by: Frank Wunderlich <frank-w@public-files.de>
Tested-By: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Sean Anderson <sean.anderson@seco.com>
Signed-off-by: Peter Geis <pgwipeout@gmail.com>
Link: https://lore.kernel.org/r/20220409152116.3834354-1-pgwipeout@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
usb_put_dev shouldn't be called when uss720_probe succeeds because of
priv->usbdev. At the same time, priv->usbdev shouldn't be set to NULL
before destroy_priv in uss720_disconnect because usb_put_dev is in
destroy_priv.
Fix this by moving priv->usbdev = NULL after usb_put_dev.
Fixes: dcb4b8ad6a ("misc/uss720: fix memory leak in uss720_probe")
Cc: stable <stable@kernel.org>
Reviewed-by: Dongliang Mu <mudongliangabcd@gmail.com>
Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
Link: https://lore.kernel.org/r/20220407024001.11761-1-hbh25y@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
In zhaoxin platform, some ehci projects will latch a wakeup signal
internal when plug in a device on port during system S0. This wakeup
signal will turn on when ehci runtime suspend, which will trigger a
system control interrupt that will resume ehci back to D0. As no
device connect, ehci will be set to runtime suspend and turn on the
internal latched wakeup signal again. It will cause a suspend-resume
loop and generate system control interrupt continuously.
Fixed this issue by clear wakeup signal latched in ehci internal when
ehci resume callback is called.
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Weitao Wang <WeitaoWang-oc@zhaoxin.com>
Link: https://lore.kernel.org/r/20220324121735.3803-1-WeitaoWang-oc@zhaoxin.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fix:
drivers/usb/typec/tcpm/tcpm.c: In function ‘run_state_machine’:
drivers/usb/typec/tcpm/tcpm.c:4724:3: error: case label does not reduce to an integer constant
case BDO_MODE_TESTDATA:
^~~~
See https://lore.kernel.org/r/YkwQ6%2BtIH8GQpuct@zn.tnic for the gory
details as to why it triggers with older gccs only.
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org
Link: https://lore.kernel.org/r/20220405151517.29753-8-bp@alien8.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Building without CONFIG_POWER_SUPPLY will fail:
drivers/usb/typec/rt1719.o: In function `rt1719_psy_set_property':
rt1719.c:(.text+0x10a): undefined reference to `power_supply_get_drvdata'
drivers/usb/typec/rt1719.o: In function `rt1719_psy_get_property':
rt1719.c:(.text+0x2c8): undefined reference to `power_supply_get_drvdata'
drivers/usb/typec/rt1719.o: In function `devm_rt1719_psy_register':
rt1719.c:(.text+0x3e9): undefined reference to `devm_power_supply_register'
drivers/usb/typec/rt1719.o: In function `rt1719_irq_handler':
rt1719.c:(.text+0xf9f): undefined reference to `power_supply_changed'
drivers/usb/typec/rt1719.o: In function `rt1719_update_pwr_opmode.part.9':
rt1719.c:(.text+0x657): undefined reference to `power_supply_changed'
drivers/usb/typec/rt1719.o: In function `rt1719_attach':
rt1719.c:(.text+0x83e): undefined reference to `power_supply_changed'
Add POWER_SUPPLY dependency to Kconfig.
Fixes: 25d29b9809 ("usb: typec: rt1719: Add support for Richtek RT1719")
Reported-by: Hulk Robot <hulkci@huawei.com>
Reviewed-by: ChiYuan Huang <cy_huang@richtek.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Ren Zhijie <renzhijie2@huawei.com>
Link: https://lore.kernel.org/r/20220418082425.41566-1-renzhijie2@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pm_runtime_get_sync will increment pm usage counter
even it failed. Forgetting to putting operation will
result in reference leak here. We fix it by replacing
it with pm_runtime_resume_and_get to keep usage counter
balanced.
Fixes: 41a7426d25 ("usb: xhci: tegra: Unlink power domain devices")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com>
Link: https://lore.kernel.org/r/20220319023822.145641-1-zhangqilong3@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
- Remove 's' & 'u' as valid ISA extension
- Restrict the extensions that can be disabled
-----BEGIN PGP SIGNATURE-----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=RKx8
-----END PGP SIGNATURE-----
Merge tag 'kvm-riscv-fixes-5.18-2' of https://github.com/kvm-riscv/linux into HEAD
KVM/riscv fixes for 5.18, take #2
- Remove 's' & 'u' as valid ISA extension
- Do not allow disabling the base extensions 'i'/'m'/'a'/'c'
Add support to checkpoint/restore GWS (Global Wave Sync) queues.
Signed-off-by: David Yat Sin <david.yatsin@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
dqm->gws_queue_count and pdd->qpd.mapped_gws_queue need to be updated
each time the queue gets evicted.
Fixes: b8020b0304 ("drm/amdkfd: Enable over-subscription with >1 GWS queue")
Signed-off-by: David Yat Sin <david.yatsin@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Few regression fixes for omap variants. These mostly fix issues related to
warnings added for system suspend, and some devicetree issues:
- Make ti-sysc driver quirks for gpt12 timer omap3 specific to fix
timer clock disabling for am335x system suspend
- Fix new system suspend warning for dra7 vpe caused by trying to
use register bits not wired for vpe
- Fix mmc boot order for omap3-gta04 that has no mmc2 or 3 wired
- Add missing touchscreen properties for am3
- Fix pin muxing for logicpd-som-lv and am3517-evm to not depend on
earlier bootloader versions
- Fix refcount leak for omap_gic_of_init
-----BEGIN PGP SIGNATURE-----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=ENHQ
-----END PGP SIGNATURE-----
gpgsig -----BEGIN PGP SIGNATURE-----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=qg1e
-----END PGP SIGNATURE-----
Merge tag 'omap-for-v5.18/fixes-take2' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into arm/fixes
Fixes for omaps
Few regression fixes for omap variants. These mostly fix issues related to
warnings added for system suspend, and some devicetree issues:
- Make ti-sysc driver quirks for gpt12 timer omap3 specific to fix
timer clock disabling for am335x system suspend
- Fix new system suspend warning for dra7 vpe caused by trying to
use register bits not wired for vpe
- Fix mmc boot order for omap3-gta04 that has no mmc2 or 3 wired
- Add missing touchscreen properties for am3
- Fix pin muxing for logicpd-som-lv and am3517-evm to not depend on
earlier bootloader versions
- Fix refcount leak for omap_gic_of_init
* tag 'omap-for-v5.18/fixes-take2' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: dts: logicpd-som-lv: Fix wrong pinmuxing on OMAP35
ARM: dts: am3517-evm: Fix misc pinmuxing
ARM: dts: am33xx-l4: Add missing touchscreen clock properties
ARM: dts: Fix mmc order for omap3-gta04
ARM: dts: dra7: Fix suspend warning for vpe powerdomain
bus: ti-sysc: Make omap3 gpt12 quirk handling SoC specific
ARM: OMAP2+: Fix refcount leak in omap_gic_of_init
iommu/omap: Fix regression in probe for NULL pointer dereference
Link: https://lore.kernel.org/r/pull-1650543308-836725@atomide.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Add a Bug sections, indicating preferred mailing method for bug
reports, to Samsung SoC related entries and memory controller drivers.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220420104708.106738-1-krzysztof.kozlowski@linaro.org'
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
HyperFlash devices fail to probe:
rpc-if-hyperflash rpc-if-hyperflash: probing of hyperbus device failed
In HyperFlash or Octal-SPI Flash mode, the Transfer Data Enable bits
(SPIDE) in the Manual Mode Enable Setting Register (SMENR) are derived
from half of the transfer size, cfr. the rpcif_bits_set() helper
function. However, rpcif_reg_{read,write}() does not take the bus size
into account, and does not double all Manual Mode Data Register access
sizes when communicating with a HyperFlash or Octal-SPI Flash device.
Fix this, and avoid the back-and-forth conversion between transfer size
and Transfer Data Enable bits, by explicitly storing the transfer size
in struct rpcif, and using that value to determine access size in
rpcif_reg_{read,write}().
Enforce that the "high" Manual Mode Read/Write Data Registers
(SM[RW]DR1) are only used for 8-byte data accesses.
While at it, forbid writing to the Manual Mode Read Data Registers,
as they are read-only.
Fixes: fff53a551d ("memory: renesas-rpc-if: Correct QSPI data transfer in Manual mode")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/cde9bfacf704c81865f57b15d1b48a4793da4286.1649681476.git.geert+renesas@glider.be
Link: https://lore.kernel.org/r/20220420070526.9367-1-krzysztof.kozlowski@linaro.org'
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
The stm32_gpio_get() should only be called for LEVEL triggered interrupts,
skip calling it for EDGE triggered interrupts altogether to avoid wasting
CPU cycles in EOI handler. On this platform, EDGE triggered interrupts are
the majority and LEVEL triggered interrupts are the exception no less, and
the CPU cycles are not abundant.
Fixes: 47beed513a ("pinctrl: stm32: Add level interrupt support to gpio irq chip")
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Alexandre Torgue <alexandre.torgue@foss.st.com>
Cc: Fabien Dessenne <fabien.dessenne@foss.st.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Marc Zyngier <maz@kernel.org>
Cc: linux-stm32@st-md-mailman.stormreply.com
Cc: linux-arm-kernel@lists.infradead.org
To: linux-gpio@vger.kernel.org
Link: https://lore.kernel.org/r/20220415215410.498349-1-marex@denx.de
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The first valid item of pin-function table should
start from the third item. The first two items,
due to historical and compatible reasons, should
be dummy items.
The two dummy items were removed accidentally in
initial submission. This fix adds them back.
Signed-off-by: Wells Lu <wellslutw@gmail.com>
Link: https://lore.kernel.org/r/1650015688-19774-1-git-send-email-wellslutw@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Currently, we use btrfs_inode_{lock,unlock}() to grant an exclusive
writeback of the relocation data inode in
btrfs_zoned_data_reloc_{lock,unlock}(). However, that can cause a deadlock
in the following path.
Thread A takes btrfs_inode_lock() and waits for metadata reservation by
e.g, waiting for writeback:
prealloc_file_extent_cluster()
- btrfs_inode_lock(&inode->vfs_inode, 0);
- btrfs_prealloc_file_range()
...
- btrfs_replace_file_extents()
- btrfs_start_transaction
...
- btrfs_reserve_metadata_bytes()
Thread B (e.g, doing a writeback work) needs to wait for the inode lock to
continue writeback process:
do_writepages
- btrfs_writepages
- extent_writpages
- btrfs_zoned_data_reloc_lock(BTRFS_I(inode));
- btrfs_inode_lock()
The deadlock is caused by relying on the vfs_inode's lock. By using it, we
introduced unnecessary exclusion of writeback and
btrfs_prealloc_file_range(). Also, the lock at this point is useless as we
don't have any dirty pages in the inode yet.
Introduce fs_info->zoned_data_reloc_io_lock and use it for the exclusive
writeback.
Fixes: 35156d8527 ("btrfs: zoned: only allow one process to add pages to a relocation inode")
CC: stable@vger.kernel.org # 5.16.x: 869f4cdc73: btrfs: zoned: encapsulate inode locking for zoned relocation
CC: stable@vger.kernel.org # 5.16.x
CC: stable@vger.kernel.org # 5.17
Cc: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
During a scrub, or device replace, we can race with block group removal
and allocation and trigger the following assertion failure:
[7526.385524] assertion failed: cache->start == chunk_offset, in fs/btrfs/scrub.c:3817
[7526.387351] ------------[ cut here ]------------
[7526.387373] kernel BUG at fs/btrfs/ctree.h:3599!
[7526.388001] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC PTI
[7526.388970] CPU: 2 PID: 1158150 Comm: btrfs Not tainted 5.17.0-rc8-btrfs-next-114 #4
[7526.390279] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[7526.392430] RIP: 0010:assertfail.constprop.0+0x18/0x1a [btrfs]
[7526.393520] Code: f3 48 c7 c7 20 (...)
[7526.396926] RSP: 0018:ffffb9154176bc40 EFLAGS: 00010246
[7526.397690] RAX: 0000000000000048 RBX: ffffa0db8a910000 RCX: 0000000000000000
[7526.398732] RDX: 0000000000000000 RSI: ffffffff9d7239a2 RDI: 00000000ffffffff
[7526.399766] RBP: ffffa0db8a911e10 R08: ffffffffa71a3ca0 R09: 0000000000000001
[7526.400793] R10: 0000000000000001 R11: 0000000000000000 R12: ffffa0db4b170800
[7526.401839] R13: 00000003494b0000 R14: ffffa0db7c55b488 R15: ffffa0db8b19a000
[7526.402874] FS: 00007f6c99c40640(0000) GS:ffffa0de6d200000(0000) knlGS:0000000000000000
[7526.404038] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[7526.405040] CR2: 00007f31b0882160 CR3: 000000014b38c004 CR4: 0000000000370ee0
[7526.406112] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[7526.407148] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[7526.408169] Call Trace:
[7526.408529] <TASK>
[7526.408839] scrub_enumerate_chunks.cold+0x11/0x79 [btrfs]
[7526.409690] ? do_wait_intr_irq+0xb0/0xb0
[7526.410276] btrfs_scrub_dev+0x226/0x620 [btrfs]
[7526.410995] ? preempt_count_add+0x49/0xa0
[7526.411592] btrfs_ioctl+0x1ab5/0x36d0 [btrfs]
[7526.412278] ? __fget_files+0xc9/0x1b0
[7526.412825] ? kvm_sched_clock_read+0x14/0x40
[7526.413459] ? lock_release+0x155/0x4a0
[7526.414022] ? __x64_sys_ioctl+0x83/0xb0
[7526.414601] __x64_sys_ioctl+0x83/0xb0
[7526.415150] do_syscall_64+0x3b/0xc0
[7526.415675] entry_SYSCALL_64_after_hwframe+0x44/0xae
[7526.416408] RIP: 0033:0x7f6c99d34397
[7526.416931] Code: 3c 1c e8 1c ff (...)
[7526.419641] RSP: 002b:00007f6c99c3fca8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[7526.420735] RAX: ffffffffffffffda RBX: 00005624e1e007b0 RCX: 00007f6c99d34397
[7526.421779] RDX: 00005624e1e007b0 RSI: 00000000c400941b RDI: 0000000000000003
[7526.422820] RBP: 0000000000000000 R08: 00007f6c99c40640 R09: 0000000000000000
[7526.423906] R10: 00007f6c99c40640 R11: 0000000000000246 R12: 00007fff746755de
[7526.424924] R13: 00007fff746755df R14: 0000000000000000 R15: 00007f6c99c40640
[7526.425950] </TASK>
That assertion is relatively new, introduced with commit d04fbe19ae
("btrfs: scrub: cleanup the argument list of scrub_chunk()").
The block group we get at scrub_enumerate_chunks() can actually have a
start address that is smaller then the chunk offset we extracted from a
device extent item we got from the commit root of the device tree.
This is very rare, but it can happen due to a race with block group
removal and allocation. For example, the following steps show how this
can happen:
1) We are at transaction T, and we have the following blocks groups,
sorted by their logical start address:
[ bg A, start address A, length 1G (data) ]
[ bg B, start address B, length 1G (data) ]
(...)
[ bg W, start address W, length 1G (data) ]
--> logical address space hole of 256M,
there used to be a 256M metadata block group here
[ bg Y, start address Y, length 256M (metadata) ]
--> Y matches W's end offset + 256M
Block group Y is the block group with the highest logical address in
the whole filesystem;
2) Block group Y is deleted and its extent mapping is removed by the call
to remove_extent_mapping() made from btrfs_remove_block_group().
So after this point, the last element of the mapping red black tree,
its rightmost node, is the mapping for block group W;
3) While still at transaction T, a new data block group is allocated,
with a length of 1G. When creating the block group we do a call to
find_next_chunk(), which returns the logical start address for the
new block group. This calls returns X, which corresponds to the
end offset of the last block group, the rightmost node in the mapping
red black tree (fs_info->mapping_tree), plus one.
So we get a new block group that starts at logical address X and with
a length of 1G. It spans over the whole logical range of the old block
group Y, that was previously removed in the same transaction.
However the device extent allocated to block group X is not the same
device extent that was used by block group Y, and it also does not
overlap that extent, which must be always the case because we allocate
extents by searching through the commit root of the device tree
(otherwise it could corrupt a filesystem after a power failure or
an unclean shutdown in general), so the extent allocator is behaving
as expected;
4) We have a task running scrub, currently at scrub_enumerate_chunks().
There it searches for device extent items in the device tree, using
its commit root. It finds a device extent item that was used by
block group Y, and it extracts the value Y from that item into the
local variable 'chunk_offset', using btrfs_dev_extent_chunk_offset();
It then calls btrfs_lookup_block_group() to find block group for
the logical address Y - since there's currently no block group that
starts at that logical address, it returns block group X, because
its range contains Y.
This results in triggering the assertion:
ASSERT(cache->start == chunk_offset);
right before calling scrub_chunk(), as cache->start is X and
chunk_offset is Y.
This is more likely to happen of filesystems not larger than 50G, because
for these filesystems we use a 256M size for metadata block groups and
a 1G size for data block groups, while for filesystems larger than 50G,
we use a 1G size for both data and metadata block groups (except for
zoned filesystems). It could also happen on any filesystem size due to
the fact that system block groups are always smaller (32M) than both
data and metadata block groups, but these are not frequently deleted, so
much less likely to trigger the race.
So make scrub skip any block group with a start offset that is less than
the value we expect, as that means it's a new block group that was created
in the current transaction. It's pointless to continue and try to scrub
its extents, because scrub searches for extents using the commit root, so
it won't find any. For a device replace, skip it as well for the same
reasons, and we don't need to worry about the possibility of extents of
the new block group not being to the new device, because we have the write
duplication setup done through btrfs_map_block().
Fixes: d04fbe19ae ("btrfs: scrub: cleanup the argument list of scrub_chunk()")
CC: stable@vger.kernel.org # 5.17
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
We have now seen panel (XMG Core 15 e21 laptop) advertizing support
for Intel proprietary eDP backlight control via DPCD registers, but
actually working only with legacy pwm control.
This patch adds panel EDID check for possible HDR static metadata and
Intel proprietary eDP backlight control is used only if that exists.
Missing HDR static metadata is ignored if user specifically asks for
Intel proprietary eDP backlight control via enable_dpcd_backlight
parameter.
v2 :
- Ignore missing HDR static metadata if Intel proprietary eDP
backlight control is forced via i915.enable_dpcd_backlight
- Printout info message if panel is missing HDR static metadata and
support for Intel proprietary eDP backlight control is detected
Fixes: 4a8d79901d ("drm/i915/dp: Enable Intel's HDR backlight interface (only SDR for now)")
Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/5284
Cc: Lyude Paul <lyude@redhat.com>
Cc: Mika Kahola <mika.kahola@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Filippo Falezza <filippo.falezza@outlook.it>
Cc: stable@vger.kernel.org
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220413082826.120634-1-jouni.hogander@intel.com
Reviewed-by: Lyude Paul <lyude@redhat.com>
The "read_bhrb" global symbol is only called under CONFIG_PPC64 of
arch/powerpc/perf/core-book3s.c but it is compiled for both 32 and 64 bit
anyway (and LLVM fails to link this on 32bit).
This fixes it by moving bhrb.o to obj64 targets.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220421025756.571995-1-aik@ozlabs.ru
When scheduling a group of events, there are constraint checks done to
make sure all events can go in a group. Example, one of the criteria is
that events in a group cannot use the same PMC. But platform specific
PMU supports alternative event for some of the event codes. During
perf_event_open(), if any event group doesn't match constraint check
criteria, further lookup is done to find alternative event.
By current design, the array of alternatives events in PMU code is
expected to be sorted by column 0. This is because in
find_alternative() the return criteria is based on event code
comparison. ie. "event < ev_alt[i][0])". This optimisation is there
since find_alternative() can be called multiple times. In power10 PMU
code, the alternative event array is not sorted properly and hence there
is breakage in finding alternative event.
To work with existing logic, fix the alternative event array to be
sorted by column 0 for power10-pmu.c
Results:
In case where an alternative event is not chosen when we could, events
will be multiplexed. ie, time sliced where it could actually run
concurrently.
Example, in power10 PM_INST_CMPL_ALT(0x00002) has alternative event,
PM_INST_CMPL(0x500fa). Without the fix, if a group of events with PMC1
to PMC4 is used along with PM_INST_CMPL_ALT, it will be time sliced
since all programmable PMC's are consumed already. But with the fix,
when it picks alternative event on PMC5, all events will run
concurrently.
Before:
# perf stat -e r00002,r100fc,r200fa,r300fc,r400fc
Performance counter stats for 'system wide':
328668935 r00002 (79.94%)
56501024 r100fc (79.95%)
49564238 r200fa (79.95%)
376 r300fc (80.19%)
660 r400fc (79.97%)
4.039150522 seconds time elapsed
With the fix, since alternative event is chosen to run on PMC6, events
will be run concurrently.
After:
# perf stat -e r00002,r100fc,r200fa,r300fc,r400fc
Performance counter stats for 'system wide':
23596607 r00002
4907738 r100fc
2283608 r200fa
135 r300fc
248 r400fc
1.664671390 seconds time elapsed
Fixes: a64e697cef ("powerpc/perf: power10 Performance Monitoring support")
Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Reviewed-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220419114828.89843-2-atrajeev@linux.vnet.ibm.com
When scheduling a group of events, there are constraint checks done to
make sure all events can go in a group. Example, one of the criteria is
that events in a group cannot use the same PMC. But platform specific
PMU supports alternative event for some of the event codes. During
perf_event_open(), if any event group doesn't match constraint check
criteria, further lookup is done to find alternative event.
By current design, the array of alternatives events in PMU code is
expected to be sorted by column 0. This is because in
find_alternative() the return criteria is based on event code
comparison. ie. "event < ev_alt[i][0])". This optimisation is there
since find_alternative() can be called multiple times. In power9 PMU
code, the alternative event array is not sorted properly and hence there
is breakage in finding alternative events.
To work with existing logic, fix the alternative event array to be
sorted by column 0 for power9-pmu.c
Results:
With alternative events, multiplexing can be avoided. That is, for
example, in power9 PM_LD_MISS_L1 (0x3e054) has alternative event,
PM_LD_MISS_L1_ALT (0x400f0). This is an identical event which can be
programmed in a different PMC.
Before:
# perf stat -e r3e054,r300fc
Performance counter stats for 'system wide':
1057860 r3e054 (50.21%)
379 r300fc (49.79%)
0.944329741 seconds time elapsed
Since both the events are using PMC3 in this case, they are
multiplexed here.
After:
# perf stat -e r3e054,r300fc
Performance counter stats for 'system wide':
1006948 r3e054
182 r300fc
Fixes: 91e0bd1e62 ("powerpc/perf: Add PM_LD_MISS_L1 and PM_BR_2PATH to power9 event list")
Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Reviewed-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220419114828.89843-1-atrajeev@linux.vnet.ibm.com
In the error handling path, the clk_prepare_enable() function
call should be balanced by a corresponding 'clk_disable_unprepare()'
call, as already done in the remove function.
Fixes: 3424e3a4f8 ("drm: bridge: analogix/dp: split exynos dp driver to bridge directory")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: Robert Foss <robert.foss@linaro.org>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220420011644.25730-1-linmq006@gmail.com
This is no longer used, remove it.
All usages were moved over to either use container_of() from a vfio_device
or to use dev_drvdata() directly on the mdev.
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20220411141403.86980-35-hch@lst.de
Reviewed-by: Kirti Wankhede <kwankhede@nvidia.com>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>
The device creator is supposed to use the dev.groups value to add sysfs
files before device_add is called, not call sysfs_create_files() after
device_add() returns. This creates a race with uevent delivery where the
extra attribute will not be visible.
This was being done because the groups had been co-opted by the mdev
driver, now that prior patches have moved the driver's groups to the
struct device_driver the dev.group is properly free for use here.
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20220411141403.86980-34-hch@lst.de
Reviewed-by: Kirti Wankhede <kwankhede@nvidia.com>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>
The last useful member in this struct is the supported_type_groups, move
it to the mdev_driver and delete mdev_parent_ops.
Replace it with mdev_driver as an argument to mdev_register_device()
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20220411141403.86980-33-hch@lst.de
Reviewed-by: Kirti Wankhede <kwankhede@nvidia.com>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>
This is only used by one sample to print a fixed string that is pointless.
In general, having a device driver attach sysfs attributes to the parent
is horrific. This should never happen, and always leads to some kind of
liftime bug as it become very difficult for the sysfs attribute to go back
to any data owned by the device driver.
Remove the general mechanism to create this abuse.
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20220411141403.86980-32-hch@lst.de
Reviewed-by: Kirti Wankhede <kwankhede@nvidia.com>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>
Now that all mdev drivers directly create their own mdev_device driver and
directly register with the vfio core's vfio_device_ops this is all dead
code.
Delete vfio_mdev.c and the mdev_parent_ops members that are connected to
it.
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20220411141403.86980-31-hch@lst.de
Reviewed-by: Kirti Wankhede <kwankhede@nvidia.com>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>
The code in both files is deeply interconnected, so merge it and
keep a bunch of structures and functions static.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20220411141403.86980-30-hch@lst.de
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>
This is straightforward conversion, the intel_vgpu already has a pointer
to the vfio_dev, which can be replaced with the embedded structure and
we can replace all the mdev_get_drvdata() with a simple container_of().
Based on an patch from Jason Gunthorpe.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20220411141403.86980-29-hch@lst.de
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>
Pass the structure we actually care about instead of deriving it from
the mdev_device in the lower level code.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20220411141403.86980-27-hch@lst.de
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>
Initialize variables at declaration time, avoid pointless gotos and
cater for the fact that intel_gvt_create_vgpu can't return NULL.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20220411141403.86980-26-hch@lst.de
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>
All the dmabufs are torn down when th VGPU is released, so there is
no need for extra refcounting here.
Based on an patch from Jason Gunthorpe.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20220411141403.86980-25-hch@lst.de
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>
Just call the initializion and exit functions directly and remove
this abstraction entirely.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20220411141403.86980-24-hch@lst.de
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>
Just call the function directly and remove a pointless wrapper.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20220411141403.86980-23-hch@lst.de
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>
Just call the functions directly. Also remove a pointless wrapper.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20220411141403.86980-22-hch@lst.de
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>
