Re: [PATCH SCSI] sr: check_events() ignore GET_EVENT when TUR says otherwise

[James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>]

On Wed, 2011-07-20 at 18:42 +0200, Kay Sievers wrote:
> On Wed, Jul 20, 2011 at 18:33, Tejun Heo <tj@xxxxxxxxxx> wrote:
> > On Thu, Jun 30, 2011 at 03:03:48PM +0200, Tejun Heo wrote:
> >> From: Kay Sievers <kay.sievers@xxxxxxxx>
> >>
> >> Some broken devices indicates that media has changed on every
> >> GET_EVENT_STATUS_NOTIFICATION.  This translates into MEDIA_CHANGE
> >> uevent on every open() which lets udev run into a loop.
> >>
> >> Verify GET_EVENT result against TUR and if it generates spurious
> >> events for several times in a row, ignore the GET_EVENT events, and
> >> trust only the TUR status.
> 
> > James, ping.
> 
> This is a rather urgent fix, that needs to go in, and also to -stable.
> 
> Systems run into endless loops with ever-growing event queues. Nothing
> really works any more if we hit that condition, unless the (broken)
> device is disconnected.

Sorry ... I have it marked for inclusion in my internal queue, I'm just
having difficulty finding time to do a dump from queue and test.  I
should be able to get all the fixes sorted on the 'plane home tomorrow.

James


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