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UBI: Block: Explain usage of blk_rq_map_sg()

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Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Richard Weinberger 2015-01-28 16:37:40 +01:00
parent 9aa272b492
commit 832b52a150
1 changed files with 6 additions and 0 deletions
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6
drivers/mtd/ubi/block.c
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@ -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);