[PATCH] mmc: Use switch() instead of if/else if in mmc_blk_issue_rq.

This uses a switch statement instead of if/else if statements.
It will make to improve clarity and scalability, and offer faster execution through compiler optimization than if/else if statements.

Signed-off-by: Namjae Jeon <linkinjeon@gmail.com>

drivers/mmc/card/block.c | 38 +++++++++++++++++++++++
1 files changed, 23 insertions(+), 15 deletions(-)

diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index 1ff5486..fe9dd89 100644
a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -1191,23 +1191,31 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
goto out;
}

- if (req && req->cmd_flags & REQ_DISCARD) {
- /* complete ongoing async transfer before issuing discard */
- if (card->host->areq)
- mmc_blk_issue_rw_rq(mq, NULL);
- if (req->cmd_flags & REQ_SECURE)
- ret = mmc_blk_issue_secdiscard_rq(mq, req);
- else
+ if (req) {
+ switch(req->cmd_flags) {
+ case REQ_DISCARD:
+ /* complete ongoing async transfer before issuing discard */
+ if (card->host->areq)
+ mmc_blk_issue_rw_rq(mq, NULL);
ret = mmc_blk_issue_discard_rq(mq, req);
- } else if (req && req->cmd_flags & REQ_FLUSH) {
- /* complete ongoing async transfer before issuing flush */
- if (card->host->areq)
- mmc_blk_issue_rw_rq(mq, NULL);
- ret = mmc_blk_issue_flush(mq, req);
- } else {
+ break;
+ case REQ_DISCARD | REQ_SECURE:
+ /* complete ongoing async transfer before issuing discard */
+ if (card->host->areq)
+ mmc_blk_issue_rw_rq(mq, NULL);
+ ret = mmc_blk_issue_secdiscard_rq(mq, req);
+ break;
+ case REQ_FLUSH:
+ /* complete ongoing async transfer before issuing discard */
+ if (card->host->areq)
+ mmc_blk_issue_rw_rq(mq, NULL);
+ ret = mmc_blk_issue_flush(mq, req);
+ break;
+ }
+ }
+ else
ret = mmc_blk_issue_rw_rq(mq, req);
- }
-
+
out:
if (!req)
/* release host only when there are no more requests */
1.7.4.4

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