linux-kernel - Re: xhci_hcd 0000:00:14.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 2 comp

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Message-ID: <55B24DB8.4080703@linux.intel.com>
Date:	Fri, 24 Jul 2015 17:37:44 +0300
From:	Mathias Nyman <mathias.nyman@...ux.intel.com>
To:	Peter Stuge <peter@...ge.se>
CC:	arekm@...en.pl, linux-kernel@...r.kernel.org,
	linux-usb@...r.kernel.org
Subject: Re: xhci_hcd 0000:00:14.0: ERROR Transfer event TRB DMA ptr not part
 of current TD ep_index 2 comp_code 1

On 24.07.2015 16:53, Peter Stuge wrote:
> Mathias Nyman wrote:
>> +++ b/drivers/usb/host/xhci-ring.c
>> @@ -82,7 +82,7 @@ dma_addr_t xhci_trb_virt_to_dma(struct xhci_segment *seg,
>>                 return 0;
>>         /* offset in TRBs */
>>         segment_offset = trb - seg->trbs;
>> -       if (segment_offset > TRBS_PER_SEGMENT)
>> +       if (segment_offset > TRBS_PER_SEGMENT - 1)
> 
> Maybe change the > comparison to >= rather than add the extra "- 1"?

Yes, sure, I'll change it if this really was the cause.

Just happy to finally find a probable cause after staring at logs and code for some time

-Mathias  

 

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