tree 8119f6030c2d07823cec9b9d5d4f6676a9dd9c20
parent abc14eb1e01286819a671019e78a23542685eee2
author Matthew Wilcox (Oracle) <willy@infradead.org> 1640061890 +0000
committer Dan Williams <dan.j.williams@intel.com> 1640297051 -0800

iomap: Fix error handling in iomap_zero_iter()

iomap_write_end() does not return a negative errno to indicate an
error, but the number of bytes successfully copied.  It cannot return
an error today, so include a debugging assertion like the one in
iomap_unshare_iter().

Fixes: c6f40468657d ("fsdax: decouple zeroing from the iomap buffered I/O code")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20211221044450.517558-1-willy@infradead.org
Signed-off-by: Dan Williams <dan.j.williams@intel.com>