diff options
| author | Seungwon Jeon <tgih.jun@samsung.com> | 2012-12-26 02:40:17 +0100 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2013-02-11 19:28:48 +0100 |
| commit | 369d321ed1baa7748e770aaaae4d8effad699633 (patch) | |
| tree | 7aae0b0a3e77dda2c5966cb0fd39d9883c77ec3a /drivers/mmc/card | |
| parent | mmc: sh_mmcif: simplify IRQ processing (diff) | |
| download | linux-369d321ed1baa7748e770aaaae4d8effad699633.tar.xz linux-369d321ed1baa7748e770aaaae4d8effad699633.zip | |
mmc: queue: exclude asynchronous transfer for special request
Unlike normal r/w request, special requests(discard, flush)
is finished with a one-time issue_fn. Request change to
mqrq_prev makes unnecessary call.
Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Reviewed-by: Konstantin Dorfman <kdorfman@codeaurora.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/card')
| -rw-r--r-- | drivers/mmc/card/queue.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c index fadf52eb5d70..d630d9861e7b 100644 --- a/drivers/mmc/card/queue.c +++ b/drivers/mmc/card/queue.c @@ -24,6 +24,8 @@ #define MMC_QUEUE_SUSPENDED (1 << 0) +#define MMC_REQ_SPECIAL_MASK (REQ_DISCARD | REQ_FLUSH) + /* * Prepare a MMC request. This just filters out odd stuff. */ @@ -58,6 +60,7 @@ static int mmc_queue_thread(void *d) do { struct request *req = NULL; struct mmc_queue_req *tmp; + unsigned int cmd_flags = 0; spin_lock_irq(q->queue_lock); set_current_state(TASK_INTERRUPTIBLE); @@ -67,12 +70,19 @@ static int mmc_queue_thread(void *d) if (req || mq->mqrq_prev->req) { set_current_state(TASK_RUNNING); + cmd_flags = req ? req->cmd_flags : 0; mq->issue_fn(mq, req); /* * Current request becomes previous request * and vice versa. + * In case of special requests, current request + * has been finished. Do not assign it to previous + * request. */ + if (cmd_flags & MMC_REQ_SPECIAL_MASK) + mq->mqrq_cur->req = NULL; + mq->mqrq_prev->brq.mrq.data = NULL; mq->mqrq_prev->req = NULL; tmp = mq->mqrq_prev; |