diff options
| author | Keith Busch <keith.busch@intel.com> | 2018-06-26 09:14:58 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-07-03 11:18:48 +0200 |
| commit | ac85c4fb7efdc29ef82571a03519b8a90b077448 (patch) | |
| tree | 078fc848d07629c7c2886da25db11010cc7f2e6f | |
| parent | c35f570dc2e1b91c63bac3b9ad9fd859eab93986 (diff) | |
block: Fix transfer when chunk sectors exceeds max
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 <jitendra.bhivare@broadcom.com>
Tested-by: Jitendra Bhivare <jitendra.bhivare@broadcom.com>
Cc: <stable@vger.kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | include/linux/blkdev.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index d94f4d0145a4..048a25b3791e 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -919,8 +919,8 @@ static inline unsigned int blk_max_size_offset(struct request_queue *q, 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) |