From a4a39040e9dacb5fa28b7ee7f842237ee534e7bf Mon Sep 17 00:00:00 2001 From: Theodore Ts'o Date: Fri, 17 Aug 2012 09:58:17 -0400 Subject: [PATCH] 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" --- fs/ext4/fsync.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c index 2a1dcea4f12e..323eb15c2d94 100644 --- a/fs/ext4/fsync.c +++ b/fs/ext4/fsync.c @@ -203,7 +203,7 @@ int ext4_sync_file(struct file *file, loff_t start, loff_t end, int datasync) struct inode *inode = file->f_mapping->host; struct ext4_inode_info *ei = EXT4_I(inode); journal_t *journal = EXT4_SB(inode->i_sb)->s_journal; - int ret; + int ret, err; tid_t commit_tid; bool needs_barrier = false; @@ -255,8 +255,11 @@ int ext4_sync_file(struct file *file, loff_t start, loff_t end, int datasync) needs_barrier = true; jbd2_log_start_commit(journal, commit_tid); ret = jbd2_log_wait_commit(journal, commit_tid); - if (needs_barrier) - blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL); + if (needs_barrier) { + err = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL); + if (!ret) + ret = err; + } out: mutex_unlock(&inode->i_mutex); trace_ext4_sync_file_exit(inode, ret); -- 2.39.2