summaryrefslogtreecommitdiff
path: root/drivers/mtd/ubi
diff options
context:
space:
mode:
authorRichard Weinberger <richard@nod.at>2015-01-28 16:37:40 +0100
committerRichard Weinberger <richard@nod.at>2015-01-28 16:37:40 +0100
commit832b52a15085d04039b01cec56845d3972c2f301 (patch)
treeab3d3e9887c06d69d92c444b6f417e2a7ba5b5ae /drivers/mtd/ubi
parent9aa272b492e7551a9ee0e2c83c720ea013698485 (diff)
UBI: Block: Explain usage of blk_rq_map_sg()
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'drivers/mtd/ubi')
-rw-r--r--drivers/mtd/ubi/block.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/mtd/ubi/block.c b/drivers/mtd/ubi/block.c
index 00caf460337e..995e61c38f24 100644
--- a/drivers/mtd/ubi/block.c
+++ b/drivers/mtd/ubi/block.c
@@ -301,6 +301,12 @@ static void ubiblock_do_work(struct work_struct *work)
struct request *req = blk_mq_rq_from_pdu(pdu);
blk_mq_start_request(req);
+
+ /*
+ * It is safe to ignore the return value of blk_rq_map_sg() because
+ * the number of sg entries is limited to UBI_MAX_SG_COUNT
+ * and ubi_read_sg() will check that limit.
+ */
blk_rq_map_sg(req->q, req, pdu->usgl.sg);
ret = ubiblock_read(pdu);