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ext4: call sync_blockdev() before invalidate_bdev() in put_super()
commit 89d96a6f8e6491f24fc8f99fd6ae66820e85c6c1 upstream. Normally all of the buffers will have been forced out to disk before we call invalidate_bdev(), but there will be some cases, where a file system operation was aborted due to an ext4_error(), where there may still be some dirty buffers in the buffer cache for the device. So try to force them out to memory before calling invalidate_bdev(). This fixes a warning triggered by generic/081: WARNING: CPU: 1 PID: 3473 at /usr/projects/linux/ext4/fs/block_dev.c:56 __blkdev_put+0xb5/0x16f() Signed-off-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -803,6 +803,7 @@ static void ext4_put_super(struct super_block *sb)
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dump_orphan_list(sb, sbi);
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J_ASSERT(list_empty(&sbi->s_orphan));
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sync_blockdev(sb->s_bdev);
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invalidate_bdev(sb->s_bdev);
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if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) {
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/*
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