Re: [PATCH] ata: libata-eh: Fix detection of deferred qc timeouts

[Guenter Roeck]

On 3/6/26 01:05, Niklas Cassel wrote:
> On Thu, Mar 05, 2026 at 06:48:05PM -0800, Guenter Roeck wrote:
> > If the `ata_qc_for_each_raw()` loop finishes without finding a matching
> > `scmd`, `qc` will hold a pointer to the last element examined, which is
> > accociated with `i == ATA_MAX_QUEUE - 1`. This element can match
> > `ap->deferred_qc`. If that happens, the condition `qc == ap->deferred_qc`
> > evaluates to true despite the loop not breaking on a scmd match.
> > In that case, the error handler mistakenly intercepts a command that
> > completed normally after an unrelated SCSI timeout, returning a timeout
> > error instead of success.
> >
> > [...]
>
> Applied commit log changes from Damien and myself.
>
>
> Applied to libata/linux.git (libata-for-7.0-fixes), thanks!

Thanks!

Guenter