Re: [PATCH] xhci: Fix Link TRB DMA in command ring stopped completion event

[Faisal Hassan <quic_faisalh@quicinc.com>]

On 10/19/2024 12:04 PM, Greg Kroah-Hartman wrote:
> On Sat, Oct 19, 2024 at 01:29:53AM +0530, Faisal Hassan wrote:
>> During the aborting of a command, the software receives a command
>> completion event for the command ring stopped, with the TRB pointing
>> to the next TRB after the aborted command.
>>
>> If the command we abort is located just before the Link TRB in the
>> command ring, then during the 'command ring stopped' completion event,
>> the xHC gives the Link TRB in the event's cmd DMA, which causes a
>> mismatch in handling command completion event.
>>
>> To handle this situation, an additional check has been added to ignore
>> the mismatch error and continue the operation.
>>
>> Cc: stable@vger.kernel.org
>> Signed-off-by: Faisal Hassan <quic_faisalh@quicinc.com>
> 
> What commit id does this fix?
> 
> thanks,
> 
> greg k-h

This does not fix any specific commit. It appears that the
implementation has been missing since the very beginning of xhci-ring.c.
Therefore, can I reference the first commit in the Fixes tag:
7f84eef0dafb ("USB: xhci: No-op command queueing and irq handler.")?

Thanks,
Faisal