iomap: Fix error handling in iomap_zero_iter()

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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: c6f4046865 ("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>

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Matthew Wilcox (Oracle) 2021-12-21 04:44:50 +00:00 • committed by Dan Williams

parent abc14eb1e0

commit 9e05e95ca8

1 changed files with 2 additions and 2 deletions

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fs/iomap/buffered-io.c

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