Re: USB 3 HDD / Pen Drive not working on 3.13.5

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Hi Nilesh,

Thanks for reporting this.  I think this is a known regression, try
reverting these two commits:

3804fad45411 "USBNET: ax88179_178a: enable tso if usb host supports sg dma"
c8f44f989019 "xhci 1.0: Limit arbitrarily-aligned scatter gather."

Mathias will be sending a pull request to Greg shortly to revert those
two commits.

Sarah Sharp

On Thu, Mar 06, 2014 at 08:57:55PM +0530, Nilesh Govindrajan wrote:
> I'm unable to access USB 3 Pen drive / HDD on 3.13.5. The same works
> on 3.13.4 without any problems.
> 
> The problem happens irrespective of whether the device is plugged in a
> USB 3.0 port or a 2.0 port.
> 
> Motherboard: GA-B85M-D3H
> CPU: i5-4670
> 
> Messages in dmesg -
> 
> [  124.985666] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called
> with disabled ep ffff88022138b000
> [  124.985667] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called
> with disabled ep ffff88022138b040
> [  135.091668] usb 2-6: reset SuperSpeed USB device number 3 using xhci_hcd
> [  135.102898] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called
> with disabled ep ffff88022138b000
> [  135.102900] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called
> with disabled ep ffff88022138b040
> [  151.211415] usb 2-6: reset SuperSpeed USB device number 3 using xhci_hcd
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