Re: [PATCH 10/16] aacraid: Terminate kthread on controller fw assert

Johannes Thumshirn
2017-02-15T08:44:14Z

On 02/14/2017 09:44 PM, Raghava Aditya Renukunta wrote:
> When the command thread performs a periodic time sync and the firmware is
> going through an assert during that time, the command thread waits for the
> response that would never arrive. The SCSI Mid layer's error handler would
> eventually reset the controller, but the eh_handler just issues a
> "thread stop" to the command thread which is stuck on a semaphore and the
> eh_thread would in turn goes to sleep waiting for the command_thread to
> respond to the stop which never happens.
>
> Fixed by allowing SIGTERM for the command thread, and during the eh_reset
> call, sends termination signal to the command thread. As a follow-up, the
> eh_reset handler would take care of the controller reset.
>
> Signed-off-by: Raghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com>
> Reviewed-by: David Carroll <David.Carroll@microsemi.com>
> ---

This look a bit scary. Can't the kthread be converted to a workqueue so
we could call cancel_work_sync()?

--
Johannes Thumshirn Storage
jthumshirn@suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Felix Imendörffer, Jane Smithard, Graham Norton
HRB 21284 (AG Nürnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850