In former commit, actual operations of each ioctl command get argument
in kernel space. Copying from/to user space is performed outside of
the function.
This commit optimizes to the new design.
Signed-off-by: Takashi Sakamoto <o-takashi@xxxxxxxxxxxxx>
---
sound/core/seq/seq_clientmgr.c | 26 ++++++++++----------------
1 file changed, 10 insertions(+), 16 deletions(-)
diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c
index 9afb0aa..40346f2 100644
--- a/sound/core/seq/seq_clientmgr.c
+++ b/sound/core/seq/seq_clientmgr.c
@@ -1615,35 +1615,29 @@ static int seq_ioctl_get_named_queue(struct snd_seq_client *client, void *arg)
}
/* GET_QUEUE_STATUS ioctl() */
-static int seq_ioctl_get_queue_status(struct snd_seq_client *client,
- void __user *arg)
+static int seq_ioctl_get_queue_status(struct snd_seq_client *client, void *arg)
{
- struct snd_seq_queue_status status;
+ struct snd_seq_queue_status *status = arg;
struct snd_seq_queue *queue;
struct snd_seq_timer *tmr;
- if (copy_from_user(&status, arg, sizeof(status)))
- return -EFAULT;
-
- queue = queueptr(status.queue);
+ queue = queueptr(status->queue);
if (queue == NULL)
return -EINVAL;
- memset(&status, 0, sizeof(status));
- status.queue = queue->queue;
+ memset(status, 0, sizeof(*status));
+ status->queue = queue->queue;
tmr = queue->timer;
- status.events = queue->tickq->cells + queue->timeq->cells;
+ status->events = queue->tickq->cells + queue->timeq->cells;
- status.time = snd_seq_timer_get_cur_time(tmr);
- status.tick = snd_seq_timer_get_cur_tick(tmr);
+ status->time = snd_seq_timer_get_cur_time(tmr);
+ status->tick = snd_seq_timer_get_cur_tick(tmr);
- status.running = tmr->running;
+ status->running = tmr->running;
- status.flags = queue->flags;
+ status->flags = queue->flags;
queuefree(queue);
- if (copy_to_user(arg, &status, sizeof(status)))
- return -EFAULT;
return 0;
}
--
2.7.4
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