Re: [PATCH] block: Make blk_drain_queue() work for stopped queues

[Dan Williams <dan.j.williams@xxxxxxxxx>]

On Tue, Mar 20, 2012 at 2:01 PM, Dan Williams <dan.j.williams@xxxxxxxxx> wrote:
> On Tue, Mar 20, 2012 at 1:06 PM, Bart Van Assche <bvanassche@xxxxxxx> wrote:
> [..]
>> - Fix a null pointer dereference triggered by sd during device removal.
>
> Hi Bart,
>
> Do you have a log of the backtrace in this case?  I'm going to put
> this patch into our libsas/isci test environment.

We beat on this patch pretty severely in our environment and appeared
to only trigger a hung_task timeout when our driver / libata took too
long to recovery for a 15 device unplug. So...

Acked-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Tested-by: Jacek Danecki <jacek.danecki@xxxxxxxxx>
Tested-by: Bartek Nowakowski <bartek.nowakowski@xxxxxxxxx>
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