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| author | Richard Weinberger <richard@nod.at> | 2015-01-28 18:37:40 +0300 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2015-01-28 18:37:40 +0300 |
| commit | 832b52a15085d04039b01cec56845d3972c2f301 (patch) | |
| tree | ab3d3e9887c06d69d92c444b6f417e2a7ba5b5ae /drivers/mtd/ubi/block.c | |
| parent | 9aa272b492e7551a9ee0e2c83c720ea013698485 (diff) | |
| download | linux-832b52a15085d04039b01cec56845d3972c2f301.tar.xz | |
UBI: Block: Explain usage of blk_rq_map_sg()
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'drivers/mtd/ubi/block.c')
| -rw-r--r-- | drivers/mtd/ubi/block.c | 6 |
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); |