Reviewed-by: Konstantin Dorfman <kdorf...@codeaurora.org>
On 12/26/2012 03:40 AM, Seungwon Jeon wrote:
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....@samsung.com>
---
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 fadf52e..c7e8716 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 remain 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;
--
Konstantin Dorfman,
QUALCOMM ISRAEL, on behalf of Qualcomm Innovation Center,
Inc. is a member of Code Aurora Forum,
hosted by The Linux Foundation
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