On Tue, 16 Jun 2009 15:43:25 -0500
"Mike Miller (OS Dev)" <mikem@xxxxxxxxxxxxxxxxxxxxxxx> wrote:
> Patch 1 of 1
>
> This patch implements wait_for_completion_interruptible_timeout in the
> scan_thread function to ensure it will exit cleanly during rmmod. Calling
> complete in cciss_remove_one caused a race condition. Using the wait with a
> timeout seems to work around that but it does fire the thread. The overhead
> should be minimal.
>
> Changelog:
> Replace wait_for_completion_interruptible with
> wait_for_completion_interruptible_timeout in scan_thread().
> Use 5 second timeout value to avoid race.
>
> Signed-off-by: Mike Miller
>
> diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
> index 4d4d5e0..76e7c10 100644
> --- a/drivers/block/cciss.c
> +++ b/drivers/block/cciss.c
> @@ -3043,7 +3043,7 @@ static int scan_thread(void *data)
> h->rescan_wait = &wait;
>
> for (;;) {
> - rc = wait_for_completion_interruptible(&wait);
> + rc = wait_for_completion_interruptible_timeout(&wait, 5);
> if (kthread_should_stop())
> break;
> if (!rc)
c'mon Mike, that's a hack.
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