Merge tag 'v3.10.107' into update

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / sound / core / timer.c

diff --git a/sound/core/timer.c b/sound/core/timer.c
index 749857a889e692c8c628ee6af45d9f4141cf9b80..98904d8e51dbe69de26f941c96cfdd7d96a6de62 100644 (file)
--- a/sound/core/timer.c
+++ b/sound/core/timer.c
@@ -1659,9 +1659,21 @@ static int snd_timer_user_params(struct file *file,
                return -EBADFD;
        if (copy_from_user(&params, _params, sizeof(params)))
                return -EFAULT;
-       if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE) && params.ticks < 1) {
-               err = -EINVAL;
-               goto _end;
+       if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE)) {
+               u64 resolution;
+
+               if (params.ticks < 1) {
+                       err = -EINVAL;
+                       goto _end;
+               }
+
+               /* Don't allow resolution less than 1ms */
+               resolution = snd_timer_resolution(tu->timeri);
+               resolution *= params.ticks;
+               if (resolution < 1000000) {
+                       err = -EINVAL;
+                       goto _end;
+               }
        }
        if (params.queue_size > 0 &&
            (params.queue_size < 32 || params.queue_size > 1024)) {