Re: [PATCH v12 6/9] usb: xhci: use bus->sysdev for DMA configuration

From: Vivek Gautam
Date: Wed Feb 08 2017 - 07:10:06 EST


On Mon, Feb 6, 2017 at 2:43 PM, Peter Chen <peter.chen@xxxxxxx> wrote:
> From: Arnd Bergmann <arnd@xxxxxxxx>
> For xhci-hcd platform device, all the DMA parameters are not
> configured properly, notably dma ops for dwc3 devices. So, set
> the dma for xhci from sysdev. sysdev is pointing to device that
> is known to the system firmware or hardware.
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> Signed-off-by: Sriram Dash <sriram.dash@xxxxxxx>
> Tested-by: Baolin Wang <>
> Tested-by: Vivek Gautam <vivek.gautam@xxxxxxxxxxxxxx>
> Tested-by: Alexander Sverdlin <alexander.sverdlin@xxxxxxxxx>
> Signed-off-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
> ---

This patch doesn't work for me anymore on db820c target [1].
While the same kernel with reverts of patches [2] [3] and an older
patch [4] by Grygorii Strashko works [5].

[2] 8c9f2de459c7 usb: dwc3: Do not set dma coherent mask
[3] d64ff406e51e usb: dwc3: use bus->sysdev for DMA configuration


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