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iomap: iomap_bmap should check iomap_apply return value 

Coverity caught this fairly minor bug, but we should check the return
value of iomap_apply regardless.

Coverity-id: 1437065
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong 2019-11-07 07:28:18 -08:00
parent add66fcbd3
commit 2b91b28e29
1 changed files with 5 additions and 1 deletions
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6
fs/iomap/fiemap.c
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@ -133,12 +133,16 @@ iomap_bmap(struct address_space *mapping, sector_t bno,
struct inode *inode = mapping->host;
loff_t pos = bno << inode->i_blkbits;
unsigned blocksize = i_blocksize(inode);
int ret;
if (filemap_write_and_wait(mapping))
return 0;
bno = 0;
iomap_apply(inode, pos, blocksize, 0, ops, &bno, iomap_bmap_actor);
ret = iomap_apply(inode, pos, blocksize, 0, ops, &bno,
iomap_bmap_actor);
if (ret)
return 0;
return bno;
}
EXPORT_SYMBOL_GPL(iomap_bmap);