On 6 April 2011 21:07, Per Forlin per.forlin@linaro.org wrote:
Change mmc_blk_issue_rw_rq() to become asynchronous. The execution flow looks like this: The mmc-queue calls issue_rw_rq(), which sends the request to the host and returns back to the mmc-queue. The mmc-queue calls isuue_rw_rq() again with a new request. This new request is prepared, in isuue_rw_rq(), then it waits for the active request to complete before pushing it to the host. When to mmc-queue is empty it will call isuue_rw_rq() with req=NULL to finish off the active request without starting a new request.
Signed-off-by: Per Forlin per.forlin@linaro.org
drivers/mmc/card/block.c | 157 +++++++++++++++++++++++++++++++++++++++------- drivers/mmc/card/queue.c | 2 +- 2 files changed, 134 insertions(+), 25 deletions(-)
diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c index eef3510..2b14d1c 100644 --- a/drivers/mmc/card/queue.c +++ b/drivers/mmc/card/queue.c @@ -59,6 +59,7 @@ static int mmc_queue_thread(void *d) mq->mqrq_cur->req = req; spin_unlock_irq(q->queue_lock);
Call set_current_state(TASK_RUNNING) before issue_fn() otherwise issue_fn will execute as TASK_INTERRUPTIBLE. Will be added in the version 3 of this patchset.
mq->issue_fn(mq, req);if (!req) { if (kthread_should_stop()) { set_current_state(TASK_RUNNING); @@ -71,7 +72,6 @@ static int mmc_queue_thread(void *d) } set_current_state(TASK_RUNNING);
- mq->issue_fn(mq, req);
} while (1); up(&mq->thread_sem);
-- 1.7.4.1