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iomap: turn the byte variable in iomap_zero_iter into a ssize_t 

@bytes also holds the return value from iomap_write_end, which can
contain a negative error value.  As @bytes is always less than the page
size even the signed type can hold the entire possible range.

Fixes: c6f4046865 ("fsdax: decouple zeroing from the iomap buffered I/O code")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20211208091203.2927754-1-hch@lst.de
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Christoph Hellwig 2021-12-08 10:12:03 +01:00 committed by Dan Williams
parent b80892ca02
commit de291b5902
1 changed files with 1 additions and 1 deletions
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2
fs/iomap/buffered-io.c
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@ -883,7 +883,7 @@ static loff_t iomap_zero_iter(struct iomap_iter *iter, bool *did_zero)
do {
unsigned offset = offset_in_page(pos);
size_t bytes = min_t(u64, PAGE_SIZE - offset, length);
ssize_t bytes = min_t(u64, PAGE_SIZE - offset, length);
struct page *page;
int status;