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Btrfs: loop waiting on writeback

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lock_extent_buffer_for_io needs to loop around and make sure the
writeback bits are not set.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2012-03-21 12:09:56 -04:00
parent cfed81a04e
commit a098d8e8ee
1 changed files with 5 additions and 5 deletions
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10
fs/btrfs/extent_io.c
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@ -3010,12 +3010,12 @@ static int lock_extent_buffer_for_io(struct extent_buffer *eb,
flush_write_bio(epd);
flush = 1;
}
wait_on_extent_buffer_writeback(eb);
btrfs_tree_lock(eb);
if (test_bit(EXTENT_BUFFER_WRITEBACK, &eb->bflags)) {
printk(KERN_ERR "Um, ok?\n");
while (1) {
wait_on_extent_buffer_writeback(eb);
btrfs_tree_lock(eb);
if (!test_bit(EXTENT_BUFFER_WRITEBACK, &eb->bflags))
break;
btrfs_tree_unlock(eb);
return 0;
}
}