Commits
Theodore Ts'o committed a4a39040e9d
ext4: check return value of blkdev_issue_flush()
blkdev_issue_flush() can fail; make sure the error gets properly
propagated.
This is a port of the equivalent ext3 patch from commit 44f4f729e7a1.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>