Re: UAS crash with Apricorn USB3 SATA bridge

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On Wed, Dec 10, 2014 at 09:19:04AM +0100, Hans de Goede wrote:
> Hi,
> 
> On 09-12-14 20:31, Darrick J. Wong wrote:
> >Hi,
> >
> >I have an Apricorn USB 3 disk dongle thing that claims to support UAS.
> >However, the kernel crashes when I plug it in[1].
> 
> Yes there are some known issues with uas error handling which are fixed
> in 3.18, can you try with a 3.18 kernel please ?

The crash pic was from 3.18.0, blk_mq disabled.  I'll work on getting a fuller
dmesg output.  Looking at the code, it looks like we end up in
queue_bulk_sg_tx() with a sg list that is shorter than num_sgs, so we fall off
the end.

(Alas it's now 1am here, so I'm going to bed. :/ )

--D

> 
> Note that the device will likely still not work, but it should no
> longer crash things. When running 3.18 please collect the output of
> "dmesg" after plugging in the drive and send that to me, then we'll see
> if we can get it to work from there.
> 
> Regards,
> 
> Hans
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