4.9-stable review patch. If anyone has any objections, please let me know.
------------------ From: Keith Busch <[email protected]> commit 15bfd21fbc5d35834b9ea383dc458a1f0c9e3434 upstream. A device may have boundary restrictions where the number of sectors between boundaries exceeds its max transfer size. In this case, we need to cap the max size to the smaller of the two limits. Reported-by: Jitendra Bhivare <[email protected]> Tested-by: Jitendra Bhivare <[email protected]> Cc: <[email protected]> Reviewed-by: Martin K. Petersen <[email protected]> Signed-off-by: Keith Busch <[email protected]> Signed-off-by: Jens Axboe <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- include/linux/blkdev.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -901,8 +901,8 @@ static inline unsigned int blk_max_size_ if (!q->limits.chunk_sectors) return q->limits.max_sectors; - return q->limits.chunk_sectors - - (offset & (q->limits.chunk_sectors - 1)); + return min(q->limits.max_sectors, (unsigned int)(q->limits.chunk_sectors - + (offset & (q->limits.chunk_sectors - 1)))); } static inline unsigned int blk_rq_get_max_sectors(struct request *rq,
