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480699 commits

Author SHA1 Message Date
Shawn Guo
155b2fd3d6 Merge branch 'imx/soc' into imx/dt 2014-09-16 10:24:58 +08:00
Shawn Guo
ee64100953 Immutable branch between MFD and some ARM sub-arch maintainers.
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Merge tag 'ib-mfd-arm-v3.18' into imx/dt

Immutable branch between MFD and some ARM sub-arch maintainers.
2014-09-16 10:24:16 +08:00
Fabio Estevam
64546e9fe3 ARM: imx_v6_v7_defconfig updates
The rtc isl1208 driver is used by mx6 nitrogen board, so let's enable it by
default.

The fsl sai driver is used by the vf610-twr board, so let's enable it by
default.

simple-audio-card driver is used by the vf610-twr board, so let's enable it by
default.

Generated this patch by doing:

- make imx_v6_v7_defconfig
- make menuconfig and manually select options
- make savedefconfig
- cp defconfig arch/arm/configs/imx_v6_v7_defconfig

,which results in some additional cleanups.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
2014-09-16 10:09:43 +08:00
Fabio Estevam
0650f855d2 ARM: imx_v4_v5_defconfig: Select CONFIG_IMX_WEIM
The imx weim driver is used by some mx27/mx1 boards, so let's enable it by
default.

Generated this patch by doing:

- make imx_v4_v5_defconfig
- make menuconfig and manually select CONFIG_IMX_WEIM
- make savedefconfig
- cp defconfig arch/arm/configs/imx_v4_v5_defconfig

,which results in some additional cleanups.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
2014-09-16 10:09:41 +08:00
Joe Perches
75fd32b8ef arm: mach-imx: Convert pr_warning to pr_warn
Use the more common pr_warn.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
2014-09-16 10:09:41 +08:00
Anson Huang
bad3db104f ARM: imx: source gpt per clk from OSC for system timer
On i.MX6Q TO > 1.0, i.MX6DL and i.MX6SX, gpt per clock
can be from OSC instead of ipg_per, as ipg_per's rate
may be scaled when system enter low bus mode, to keep
system timer NOT drift, better to make gpt per clock
at fixed rate, here add support for gpt per clock to
be from OSC which is at fixed rate always.

There are some difference on this implementation of
gpt per clock source, see below for details:

i.MX6Q TO > 1.0: GPT_CR_CLKSRC, b'101 selects fix clock
    of OSC / 8 for gpt per clk;
i.MX6DL and i.MX6SX: GPT_CR_CLKSRC, b'101 selects OSC
    for gpt per clk, and we must enable GPT_CR_24MEM to
    enable OSC clk source for gpt per, GPT_PR_PRESCALER24M
    is for pre-scaling of this OSC clk, here set it to 8
    to make gpt per clk is 3MHz;
i.MX6SL: ipg_per can be from OSC directly, so no need to
    implement this new clk source for gpt per.

Signed-off-by: Anson Huang <b20788@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
2014-09-16 10:09:41 +08:00
Anson Huang
6f11c69d35 ARM: imx: add gpt_3m clk for i.mx6qdl
Add gpt_3m clock for i.mx6qdl, as gpt can source clock
from OSC, some i.MX6 series SOCs has fixed divider of
8 for gpt clock, so here add a fix clk of gpt_3m.

i.MX6Q TO1.0 has no gpt_3m option, so force it to be
from ipg_per.

Signed-off-by: Anson Huang <b20788@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
2014-09-16 10:09:40 +08:00
Shawn Guo
69d9a3fe06 ARM: imx: fix register offset of pll7_usb_host gate clock
There is a copy&paste error on register offset of pll7_usb_host gate
clock introduced by i.MX6 PLL bypass support patches.  The error breaks
the ENET function, because it overwrites the pll6_enet gate bit.

Correct the offset for all i.MX6 clock drivers.

Thanks to Fugang Duan <B38611@freescale.com> for spotting the error.

Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
2014-09-16 10:09:40 +08:00
Shengjiu Wang
dbaf381ffb ARM: clk-imx6sl: refine clock tree for SSI
Each SSI has "ssi", "ssi_ipg" clocks, and they share same gate bits.

Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
2014-09-16 10:09:39 +08:00
Shawn Guo
dc4805c2e7 ARM: imx: remove ENABLE and BYPASS bits from clk-pllv3 driver
Since ENABLE and BYPASS bits of PLLs are now implemented as separate
gate and mux clocks by clock drivers, the code handling these two bits
can be removed from clk-pllv3 driver.

Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
2014-09-16 10:06:49 +08:00
Shawn Guo
db7c065945 ARM: imx6sx: add BYPASS support for PLL clocks
This is the same change for imx6sx clock driver as "ARM: imx6q: add BYPASS
support for PLL clocks" for imx6q.  The difference is that only anaclk1
is available on imx6sx.

Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
2014-09-16 10:06:49 +08:00
Shawn Guo
e90f41990d ARM: imx6sl: add BYPASS support for PLL clocks
This is the same change for imx6sl clock driver as "ARM: imx6q: add BYPASS
support for PLL clocks" for imx6q.  The difference is that only anaclk1
is available on imx6sl.

Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
2014-09-16 10:06:48 +08:00
Shawn Guo
b1f156db47 ARM: imx6q: add BYPASS support for PLL clocks
The imx6q clock driver currently hard-codes all PLL clocks to source
from OSC24M without BYPASS support.  The patch adds the missing lvds_in
clock which is mutually exclusive with lvds_gate, and implements BYPASS
and BYPASS_CLK_SRC selection for PLL clocks as per Figure 10-3. Primary
Clock Generation in IMX6DQRM, i.e. both BYPASS_CLK_SRC and BYPASS bits
are implemented as mux clocks, and ENABLE bit of PLL clocks is
implemented as a gate clock after BYPASS mux.

Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
2014-09-16 10:06:48 +08:00
Shawn Guo
19d863446a ARM: imx: add an exclusive gate clock type
There are a couple of gate clocks are mutually exclusive on i.MX6, i.e.
LVDSCLK1_IBEN and LVDSCLK1_OBEN.  They cannot be enabled simultaneously.
This patches adds an exclusive gate clock type specifically for such
case.  The clock driver will need to call imx_clk_gate_exclusive() to
register a gate clock with parameter exclusive_mask indicating the mask
of gate bits which are mutually exclusive to this gate clock.

Right now, it only handles the exclusive gate clocks which are defined
in a single hardware register, which is the case we're running into
today.  But it can be extended to handle exclusive gate clocks defined
in different registers later if needed.

Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
2014-09-16 10:06:48 +08:00
Shengjiu Wang
bd404b1d33 ARM: clk-imx6q: refine clock tree for SSI
Each SSI has "ssi", "ssi_ipg" clocks, and they share same gate bits.

Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
2014-09-16 10:06:47 +08:00
Shengjiu Wang
aec247d4ac ARM: clk-imx6q: refine clock tree for ASRC
ASRC has "asrc", "asrc_ipg", "asrc_mem" clocks, and they share
the same gate bits.

Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
2014-09-16 10:06:47 +08:00
Fancy Fang
e37c1ad032 ARM: clk-imx6sl: correct the pxp and epdc axi clock selections
The parent clocks of IMX6SL_CLK_PXP_AXI_SEL and IMX6SL_CLK_EPDC_AXI_SEL
clocks are not the same. So split the epdc_pxp_sels into two different
clock selections 'pxp_axi_sels' and 'epdc_axi_sels'.

Signed-off-by: Fancy Fang <chen.fang@freescale.com>
Signed-off-by: Robby Cai <R63905@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
2014-09-16 10:06:46 +08:00
Shengjiu Wang
7bce3d23ec ARM: clk-imx6q: refine clock tree for ESAI
There are three clock for ESAI, esai_extal, esai_ipg, esai_mem. Rename
'esai' to 'esai_extal', 'esai_ahb' to 'esai_mem', and add 'esai_ipg'.
Make the clock for ESAI more clear and align them with imx6sx.

Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
2014-09-16 10:06:46 +08:00
Fabio Estevam
0783a56087 ARM: clk-imx6sl: Select appropriate parents for LCDIF clocks
PLL5 is well suited for being the parent of IMX6SL_CLK_LCDIF_PIX_SEL and
PLL2_PFD for IMX6SL_CLK_LCDIF_AXI_SEL.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
2014-09-16 10:06:46 +08:00
Fabio Estevam
bad66c3ebd ARM: clk-imx6sl: Remove csi_lcdif_sels[]
Currently csi_lcdif_sels[] is a shared array for the providing the possible
clock parents for csi and lcdif blocks.

This is not correct, as csi and lcdif do not share the same clock parents.

Introduce csi_sels[] for the csi and lcdif_axi_sels[] for the lcdif clocks in
order to describe the parents correctly.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
2014-09-16 10:06:45 +08:00
Stefan Agner
21231f81f1 ARM: imx: clk-vf610: Add USBPHY clocks
This commit adds PLL7 which is required for USBPHY1. It also adds
the USB PHY and USB Controller clocks and the gates to enable them.

Acked-by: Jingchang Lu <jingchang.lu@freescale.com>
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
2014-09-16 10:06:45 +08:00
Anson Huang
47526e410d ARM: imx: add cpufreq support for i.mx6sx
Add cpufreq support for i.MX6SX, using common
i.MX6Q cpufreq driver.

Signed-off-by: Anson Huang <b20788@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
2014-09-16 10:06:45 +08:00
Stefan Agner
3b18dd7a86 ARM: imx: clk-vf610: introduce clks_init_on
At the end of the boot process, the clock framework might disable
required main PLL's. So far, this was no issue since drivers
requested clocks, which are descended of the main PLL's (e.g.
pll1_pfd1, which provides the system clock).

To archive the full 500MHz system clock, DDR clock need to be a
descendant of PLL2 rather than PLL1 (DDRC_CLK_SEL set to 0). The
bootloader sets up the clocks accordingly before making use of
DDR at all. However, in Linux, there is no driver using PLL2,
which lead to PLL2 being disabled by the clock framework.

With this patch, we make sure that the main system clock and the
DDR clock are initially enabled and are kept enabled.

Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
2014-09-16 10:06:44 +08:00
Alexander Shiyan
24980dc810 ARM: i.MX1: Add devicetree support
This patch adds basic devicetree support for i.MX1 based SoCs.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
2014-09-16 10:06:44 +08:00
Jason Liu
c896e93850 ARM: i.MX6: add more chip revision support
Add more revision support for the new i.MX6DQ tape-out (TO1.5).  This
TO1.5 is the Rev 1.3 as documented in i.MX6DQ data sheet, because TO1.3
and TO1.4 are never revealed.

Signed-off-by: Jason Liu <r64343@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
2014-09-16 10:06:44 +08:00
Dave Airlie
b2efb3f0a1 Linux 3.17-rc5
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drm: backmerge tag 'v3.17-rc5' into drm-next

This is requested to get the fixes for intel and radeon into the
same tree for future development work.

i915_display.c: fix missing dev_priv conflict.
2014-09-16 11:38:04 +10:00
Peter Neubauer
2e151c70df x86: HPET force enable for e6xx based systems
As the Soekris net6501 and other e6xx based systems do not have
any ACPI implementation, HPET won't get enabled.
This patch enables HPET on such platforms.

[    0.430149] pci 0000:00:01.0: Force enabled HPET at 0xfed00000
[    0.644838] HPET: 3 timers in total, 0 timers will be used for per-cpu timer

Original patch by Peter Neubauer (http://www.mail-archive.com/soekris-tech@lists.soekris.com/msg06462.html)
slightly modified by Conrad Kostecki <ck@conrad-kostecki.de> and massaged
accoring to Thomas Gleixners <tglx@linutronix.de> by me.

Suggested-by: Conrad Kostecki <ck@conrad-kostecki.de>
Signed-off-by: Eric Sesterhenn <eric.sesterhenn@lsexperts.de>
Cc: Peter Neubauer <pneubauer@bluerwhite.org>
Link: http://lkml.kernel.org/r/5412D3A5.2030909@lsexperts.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2014-09-15 17:53:35 -07:00
Geert Uytterhoeven
34abee3981 ARM: shmobile: r8a73a4 dtsi: Add SoC-specific irqc compatible property
The interrupt controller used the generic compatible property only.
Add the SoC-specific one, to make it future proof.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2014-09-16 09:37:41 +09:00
Julian Anastasov
cf34e646da ipvs: address family of LBLCR entry depends on svc family
The LBLCR entries should use svc->af, not dest->af.
Needed to support svc->af != dest->af.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Alex Gartrell <agartrell@fb.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-09-16 09:03:38 +09:00
Julian Anastasov
f7fa380069 ipvs: address family of LBLC entry depends on svc family
The LBLC entries should use svc->af, not dest->af.
Needed to support svc->af != dest->af.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Alex Gartrell <agartrell@fb.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-09-16 09:03:38 +09:00
Alex Gartrell
8052ba2925 ipvs: support ipv4 in ipv6 and ipv6 in ipv4 tunnel forwarding
Pull the common logic for preparing an skb to prepend the header into a
single function and then set fields such that they can be used in either
case (generalize tos and tclass to dscp, hop_limit and ttl to ttl, etc)

Signed-off-by: Alex Gartrell <agartrell@fb.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-09-16 09:03:37 +09:00
Alex Gartrell
c63e4de2be ipvs: Add generic ensure_mtu_is_adequate to handle mixed pools
The out_rt functions check to see if the mtu is large enough for the packet
and, if not, send icmp messages (TOOBIG or DEST_UNREACH) to the source and
bail out.  We needed the ability to send ICMP from the out_rt_v6 function
and DEST_UNREACH from the out_rt function, so we just pulled it out into a
common function.

Signed-off-by: Alex Gartrell <agartrell@fb.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-09-16 09:03:37 +09:00
Alex Gartrell
919aa0b2bb ipvs: Pull out update_pmtu code
Another step toward heterogeneous pools, this removes another piece of
functionality currently specific to each address family type.

Signed-off-by: Alex Gartrell <agartrell@fb.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-09-16 09:03:36 +09:00
Alex Gartrell
4a4739d56b ipvs: Pull out crosses_local_route_boundary logic
This logic is repeated in both out_rt functions so it was redundant.
Additionally, we'll need to be able to do checks to route v4 to v6 and vice
versa in order to deal with heterogeneous pools.

This patch also updates the callsites to add an additional parameter to the
out route functions.

Signed-off-by: Alex Gartrell <agartrell@fb.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-09-16 09:03:36 +09:00
Alex Gartrell
391f503d69 ipvs: prevent mixing heterogeneous pools and synchronization
The synchronization protocol is not compatible with heterogeneous pools, so
we need to verify that we're not turning both on at the same time.

Signed-off-by: Alex Gartrell <agartrell@fb.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-09-16 09:03:35 +09:00
Alex Gartrell
ba38528aae ipvs: Supply destination address family to ip_vs_conn_new
The assumption that dest af is equal to service af is now unreliable, so we
must specify it manually so as not to copy just the first 4 bytes of a v6
address or doing an illegal read of 16 butes on a v6 address.

We "lie" in two places: for synchronization (which we will explicitly
disallow from happening when we have heterogeneous pools) and for black
hole addresses where there's no real dest.

Signed-off-by: Alex Gartrell <agartrell@fb.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-09-16 09:03:34 +09:00
Alex Gartrell
ad147aa4dd ipvs: Pass destination address family to ip_vs_trash_get_dest
Part of a series of diffs to tease out destination family from virtual
family.  This diff just adds a parameter to ip_vs_trash_get and then uses
it for comparison rather than svc->af.

Signed-off-by: Alex Gartrell <agartrell@fb.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-09-16 09:03:34 +09:00
Alex Gartrell
655eef103d ipvs: Supply destination addr family to ip_vs_{lookup_dest,find_dest}
We need to remove the assumption that virtual address family is the same as
real address family in order to support heterogeneous services (that is,
services with v4 vips and v6 backends or the opposite).

Signed-off-by: Alex Gartrell <agartrell@fb.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-09-16 09:03:33 +09:00
Alex Gartrell
6cff339bbd ipvs: Add destination address family to netlink interface
This is necessary to support heterogeneous pools.  For example, if you have
an ipv6 addressed network, you'll want to be able to forward ipv4 traffic
into it.

This patch enforces that destination address family is the same as service
family, as none of the forwarding mechanisms support anything else.

For the old setsockopt mechanism, we simply set the dest address family to
AF_INET as we do with the service.

Signed-off-by: Alex Gartrell <agartrell@fb.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-09-16 09:03:33 +09:00
Kenny Mathis
616a9be25c ipvs: Add simple weighted failover scheduler
Add simple weighted IPVS failover support to the Linux kernel. All
other scheduling modules implement some form of load balancing, while
this offers a simple failover solution. Connections are directed to
the appropriate server based solely on highest weight value and server
availability. Tested functionality with keepalived.

Signed-off-by: Kenny Mathis <kmathis@chokepoint.net>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-09-16 09:03:32 +09:00
Stephen Rothwell
b262b35c2c pnfs/blocklayout: include vmalloc.h for __vmalloc
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-09-15 19:33:28 -04:00
Masahiro Yamada
55ab9ec99b mtd: denali: remove a set-but-unused variable
The variable "retry" in wait_for_irq() is set, but not used.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-09-15 16:31:24 -07:00
Masahiro Yamada
93e3c8adf6 mtd: denali: change the type of iterators to int
We should rathar use "int" type for loop iterators.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-09-15 16:31:19 -07:00
Masahiro Yamada
3157d1ed23 mtd: denali: remove unnecessary casts
Useless casts result in unreadable source code.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-09-15 16:31:16 -07:00
Masahiro Yamada
5637b69d1c mtd: denali: remove unnecessary variable initializations
All of these variables are initialized to zero and then
set to a different value below.
Zero-initializing is redundant.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-09-15 16:31:03 -07:00
Masahiro Yamada
43914a2dcc mtd: denali: fix the format of comment blocks
We should use
/*
 * Blah Blah ...
 * ...
 */

for multi-line comment blocks.

In addition, refactor some comments where it seems reasonable and
remove some comments where the code is clear enough such as:

    /* clear interrupts */
    clear_interrupts(denali);

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-09-15 16:30:57 -07:00
Brian Norris
7622d4905a Linux 3.17-rc5
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Merge tag 'v3.17-rc5' from upstream
2014-09-15 16:28:16 -07:00
Linus Torvalds
2324067fa9 regmap: Fix registers file debugfs
Ensure that the mode reported for the registers file in debugfs is
 accurate by marking it as read only when the define to enable writes has
 not been set.  This is on the edge of being a bug fix but it's debugfs
 and it makes it much easier for users to spot what's going wrong when
 they forget to enable writeability.
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Merge tag 'regmap-v3.17-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap

Pull regmap fix from Mark Brown:
 "Fix registers file in debugfs

  Ensure that the mode reported for the registers file in debugfs is
  accurate by marking it as read only when the define to enable writes
  has not been set.  This is on the edge of being a bug fix but it's
  debugfs and it makes it much easier for users to spot what's going
  wrong when they forget to enable writeability"

* tag 'regmap-v3.17-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
  regmap: Fix debugfs-file 'registers' mode
2014-09-15 16:20:56 -07:00
Subhash Jadavani
6fe8c1dbef scsi: balance out autopm get/put calls in scsi_sysfs_add_sdev()
SCSI Well-known logical units generally don't have any scsi driver
associated with it which means no one will call scsi_autopm_put_device()
on these wlun scsi devices and this would result in keeping the
corresponding scsi device always active (hence LLD can't be suspended as
well). Same exact problem can be seen for other scsi device representing
normal logical unit whose driver is yet to be loaded. This patch fixes
the above problem with this approach:

- make the scsi_autopm_put_device call at the end of scsi_sysfs_add_sdev
  to make it balance out the get earlier in the function.
- let drivers do paired get/put calls in their probe methods.

Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Dolev Raviv <draviv@codeaurora.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-09-15 16:02:05 -07:00
Alan Stern
50c4e96411 scsi: don't store LUN bits in CDB[1] for USB mass-storage devices
The SCSI specification requires that the second Command Data Byte
should contain the LUN value in its high-order bits if the recipient
device reports SCSI level 2 or below.  Nevertheless, some USB
mass-storage devices use those bits for other purposes in
vendor-specific commands.  Currently Linux has no way to send such
commands, because the SCSI stack always overwrites the LUN bits.

Testing shows that Windows 7 and XP do not store the LUN bits in the
CDB when sending commands to a USB device.  This doesn't matter if the
device uses the Bulk-Only or UAS transports (which virtually all
modern USB mass-storage devices do), as these have a separate
mechanism for sending the LUN value.

Therefore this patch introduces a flag in the Scsi_Host structure to
inform the SCSI midlayer that a transport does not require the LUN
bits to be stored in the CDB, and it makes usb-storage set this flag
for all devices using the Bulk-Only transport.  (UAS is handled by a
separate driver, but it doesn't really matter because no SCSI-2 or
lower device is at all likely to use UAS.)

The patch also cleans up the code responsible for storing the LUN
value by adding a bitflag to the scsi_device structure.  The test for
whether to stick the LUN value in the CDB can be made when the device
is probed, and stored for future use rather than being made over and
over in the fast path.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-by: Tiziano Bacocco <tiziano.bacocco@gmail.com>
Acked-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-09-15 16:01:58 -07:00