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William Wu 91062e663b usb: dwc3: core: leave default DMA if the controller does not support 64-bit DMA
On some DWC3 controllers (e.g. Rockchip SoCs), the DWC3 core
doesn't support 64-bit DMA address width. In this case, this
driver should use the default 32-bit mask. Otherwise, the DWC3
controller will break if it runs on above 4GB physical memory
environment.

This patch reads the DWC_USB3_AWIDTH bits of GHWPARAMS0 which
used for the DMA address width, and only configure 64-bit DMA
mask if the DWC_USB3_AWIDTH is 64.

Fixes: 45d39448b4 ("usb: dwc3: support 64 bit DMA in platform driver")
Cc: stable <stable@kernel.org>
Reviewed-by: Sven Peter <sven@svenpeter.dev>
Signed-off-by: William Wu <william.wu@rock-chips.com>
Link: https://lore.kernel.org/r/20220901083446.3799754-1-william.wu@rock-chips.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-07 16:30:35 +02:00
arch powerpc fixes for 6.0 #4 2022-09-04 11:33:22 -07:00
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drivers usb: dwc3: core: leave default DMA if the controller does not support 64-bit DMA 2022-09-07 16:30:35 +02:00
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