mmc: block: Fix block status codes

Commit 2a842acab109 ("block: introduce new block status code type") changed
the error type but not in patches merged through the mmc tree, like
commit 0493f6fe5bde ("mmc: block: Move boot partition locking into a driver
op"). Fix one error code that is incorrect and also use BLK_STS_OK in
preference to 0.

Fixes: 17ece345a042 ("Merge tag 'mmc-v4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/core/block.c

@@ -1213,7 +1213,7 @@ static void mmc_blk_issue_drv_op(struct mmc_queue *mq, struct request *req)
 		break;
 	}
 	mq_rq->drv_op_result = ret;
-	blk_end_request_all(req, ret);
+	blk_end_request_all(req, ret ? BLK_STS_IOERR : BLK_STS_OK);
 }
 
 static void mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
@@ -1718,9 +1718,9 @@ static bool mmc_blk_rw_cmd_err(struct mmc_blk_data *md, struct mmc_card *card,
 		if (err)
 			req_pending = old_req_pending;
 		else
-			req_pending = blk_end_request(req, 0, blocks << 9);
+			req_pending = blk_end_request(req, BLK_STS_OK, blocks << 9);
 	} else {
-		req_pending = blk_end_request(req, 0, brq->data.bytes_xfered);
+		req_pending = blk_end_request(req, BLK_STS_OK, brq->data.bytes_xfered);
 	}
 	return req_pending;
 }