From: Heinz Mauelshagen Date: Tue, 18 Dec 2018 16:35:41 +0000 (+0100) Subject: dm raid: fix false -EBUSY when handling check/repair message X-Git-Tag: android-x86-9.0-r1~4^2~67^2~175 X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=fe8e594cb7246815d051d78b74dc5270b7d598f3;p=android-x86%2Fkernel.git dm raid: fix false -EBUSY when handling check/repair message [ Upstream commit 74694bcbdf7e28a5ad548cdda9ac56d30be00d13 ] Sending a check/repair message infrequently leads to -EBUSY instead of properly identifying an active resync. This occurs because raid_message() is testing recovery bits in a racy way. Fix by calling decipher_sync_action() from raid_message() to properly identify the idle state of the RAID device. Signed-off-by: Heinz Mauelshagen Signed-off-by: Mike Snitzer Signed-off-by: Sasha Levin --- diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c index 6c9b54288261..23de59a692c5 100644 --- a/drivers/md/dm-raid.c +++ b/drivers/md/dm-raid.c @@ -3690,8 +3690,7 @@ static int raid_message(struct dm_target *ti, unsigned int argc, char **argv, set_bit(MD_RECOVERY_INTR, &mddev->recovery); md_reap_sync_thread(mddev); } - } else if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || - test_bit(MD_RECOVERY_NEEDED, &mddev->recovery)) + } else if (decipher_sync_action(mddev, mddev->recovery) != st_idle) return -EBUSY; else if (!strcasecmp(argv[0], "resync")) ; /* MD_RECOVERY_NEEDED set below */