diff options
| -rw-r--r-- | drivers/md/dm-io.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c index c09359db3a90..37de0173b6d2 100644 --- a/drivers/md/dm-io.c +++ b/drivers/md/dm-io.c @@ -290,6 +290,12 @@ static void do_region(int rw, unsigned region, struct dm_io_region *where, unsigned short logical_block_size = queue_logical_block_size(q); sector_t num_sectors; + /* Reject unsupported discard requests */ + if ((rw & REQ_DISCARD) && !blk_queue_discard(q)) { + dec_count(io, region, -EOPNOTSUPP); + return; + } + /* * where->count may be zero if rw holds a flush and we need to * send a zero-sized flush. |