Re: [PATCH 2/2] mmc: rtsx: Revert "mmc: rtsx: add support for pre_reqandpost_req"

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hi Lee

Sorry for previous email, only [PATCH 2/2] mmc: rtsx: Revert "mmc: rtsx: add support for pre_reqand post_req"
if need for 3.15 fix.

Best Regards.
micky.
On 04/29/2014 03:36 PM, Ulf Hansson wrote:
On 29 April 2014 03:54,<micky_ching@xxxxxxxxxxxxxx>  wrote:
>From: Micky Ching<micky_ching@xxxxxxxxxxxxxx>
>
>This reverts commit c42deffd5b53c9e583d83c7964854ede2f12410d.
>
>commit <mmc: rtsx: add support for pre_req and post_req> did use
>mutex_unlock() in tasklet, but mutex_unlock() can't used in
>tasklet(atomic context). The driver need use mutex to avoid concurrency,
>so we can't use tasklet here, the patch need to be removed.
>
>The spinlock host->lock and pcr->lock may deadlock, one way to solve the
>deadlock is remove host->lock in sd_isr_done_transfer(), but if using
>workqueue the we can avoid using the spinlock and also avoid the problem.
>
>Signed-off-by: Micky Ching<micky_ching@xxxxxxxxxxxxxx>
Acked-by: Ulf Hansson<ulf.hansson@xxxxxxxxxx>


--
To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux USB Devel]     [Linux Media]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux