The actor should never return a larger value than the length that was
passed in. The current code handles this gracefully, but the opcoming
iter model will be more picky.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
fs/iomap/buffered-io.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index 44587209e6d7c7..26e16cc9d44931 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -205,7 +205,7 @@ struct iomap_readpage_ctx {
struct readahead_control *rac;
};
-static int iomap_read_inline_data(struct inode *inode, struct page *page,
+static loff_t iomap_read_inline_data(struct inode *inode, struct page *page,
const struct iomap *iomap)
{
size_t size = i_size_read(inode) - iomap->offset;
@@ -253,7 +253,7 @@ iomap_readpage_actor(struct inode *inode, loff_t pos, loff_t length, void *data,
sector_t sector;
if (iomap->type == IOMAP_INLINE)
- return iomap_read_inline_data(inode, page, iomap);
+ return min(iomap_read_inline_data(inode, page, iomap), length);
/* zero post-eof blocks as the page may be mapped */
iop = iomap_page_create(inode, page);
--
2.30.2
