A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-28 18:51:56 -04:00
Code Issues Projects Releases Packages Wiki Activity

MD: warn for potential deadlock

Browse source 
The personality thread shouldn't call mddev_suspend(). Because
mddev_suspend() will for all IO finish, but IO is handled in personality
thread, so this could cause deadlock. To trigger this early, add a
warning if mddev_suspend() is called from personality thread.

Suggested-by: NeilBrown <[email protected]>
Cc: Artur Paszkiewicz <[email protected]>
Signed-off-by: Shaohua Li <[email protected]>
This commit is contained in:
Shaohua Li 2016-02-24 17:41:01 -08:00
commit 70d9798b95
1 changed files with 1 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

1
drivers/md/md.c
View file

@ -305,6 +305,7 @@ static blk_qc_t md_make_request(struct request_queue *q, struct bio *bio)
*/
void mddev_suspend(struct mddev *mddev)
{
WARN_ON_ONCE(current == mddev->thread->tsk);
if (mddev->suspended++)
return;
synchronize_rcu();