Patchwork md:Check if call to thaw_bdev fails in unlock_fs

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Submitter Nick
Date July 20, 2015, 7:35 p.m.
Message ID <1437420948-26201-1-git-send-email-xerofoify@gmail.com>
Download mbox | patch
Permalink /patch/6830351/
State New
Headers show

Comments

Nick - July 20, 2015, 7:35 p.m.
This adds a check to the function unlock_fs to check if the call
to thaw_bdev failed by returning a return code and if so print
on the log level of KERN_CRIT that the thaw has failed on the
passed device structure pointer's name before returnin immediately
to this function's caller.

Signed-off-by: Nicholas Krause <xerofoify@gmail.com>
---
 drivers/md/dm.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

Patch

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index ab37ae1..20ccc36 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -3152,7 +3152,11 @@  static void unlock_fs(struct mapped_device *md)
 	if (!test_bit(DMF_FROZEN, &md->flags))
 		return;
 
-	thaw_bdev(md->bdev, md->frozen_sb);
+	if (!thaw_bdev(md->bdev, md->frozen_sb)) {
+		pr_crit("Thaw failed on the file device %s\n", md->name);
+		return;
+	}
+
 	md->frozen_sb = NULL;
 	clear_bit(DMF_FROZEN, &md->flags);
 }