[ALSA] Fix-up sleeping in sound/usb

USB generic driver,USB USX2Y
Description: Fix-up sleeping in sound/usb. Replace big_mdelay() with
msleep() to guarantee the task delays as expected. This also involved
replacing/removing custom sleep functions.

Patch is compile-tested.

Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

3 files changed, 5 insertions, 8 deletions

diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
index 3eaa08e3e6a6..f2b760d8d77e 100644
--- a/sound/usb/usbaudio.c
+++ b/sound/usb/usbaudio.c
@@ -792,7 +792,7 @@ static int start_urbs(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime)
  */
 static int wait_clear_urbs(snd_usb_substream_t *subs)
 {
-        int timeout = HZ;
+        unsigned long end_time = jiffies + msecs_to_jiffies(1000);
         unsigned int i;
         int alive;
 
@@ -812,7 +812,7 @@ static int wait_clear_urbs(snd_usb_substream_t *subs)
                         break;
                 set_current_state(TASK_UNINTERRUPTIBLE);
                 schedule_timeout(1);
-        } while (--timeout > 0);
+        } while (time_before(jiffies, end_time));
         if (alive)
                 snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive);
         return 0;
diff --git a/sound/usb/usx2y/usX2Yhwdep.c b/sound/usb/usx2y/usX2Yhwdep.c
index bef9b0c142c4..0281a362857a 100644
--- a/sound/usb/usx2y/usX2Yhwdep.c
+++ b/sound/usb/usx2y/usX2Yhwdep.c
@@ -232,8 +232,7 @@ static int snd_usX2Y_hwdep_dsp_load(snd_hwdep_t *hw, snd_hwdep_dsp_image_t *dsp)
         if (err)
                 return err;
         if (dsp->index == 1) {
-                set_current_state(TASK_UNINTERRUPTIBLE);
-                schedule_timeout(HZ/4);                 // give the device some time 
+                msleep(250);                            // give the device some time
                 err = usX2Y_AsyncSeq04_init(priv);
                 if (err) {
                         snd_printk("usX2Y_AsyncSeq04_init error \n");
diff --git a/sound/usb/usx2y/usx2yhwdeppcm.c b/sound/usb/usx2y/usx2yhwdeppcm.c
index bb2c8e9000c6..ef28061287f2 100644
--- a/sound/usb/usx2y/usx2yhwdeppcm.c
+++ b/sound/usb/usx2y/usx2yhwdeppcm.c
@@ -50,6 +50,7 @@
    Currently rawusb dma pcm buffer transport (this file) is only available to snd-usb-usx2y. 
 */
 
+#include <linux/delay.h>
 #include "usbusx2yaudio.c"
 
 #if defined(USX2Y_NRPACKS_VARIABLE) || (!defined(USX2Y_NRPACKS_VARIABLE) &&  USX2Y_NRPACKS == 1)
@@ -520,11 +521,8 @@ static int snd_usX2Y_usbpcm_prepare(snd_pcm_substream_t *substream)
                 usX2Y->hwdep_pcm_shm->playback_iso_start = -1;
                 if (atomic_read(&subs->state) < state_PREPARED) {
                         while (usX2Y_iso_frames_per_buffer(runtime, usX2Y) > usX2Y->hwdep_pcm_shm->captured_iso_frames) {
-                                signed long timeout;
                                 snd_printd("Wait: iso_frames_per_buffer=%i,captured_iso_frames=%i\n", usX2Y_iso_frames_per_buffer(runtime, usX2Y), usX2Y->hwdep_pcm_shm->captured_iso_frames);
-                                set_current_state(TASK_INTERRUPTIBLE);
-                                timeout = schedule_timeout(HZ/100 + 1);
-                                if (signal_pending(current)) {
+                                if (msleep_interruptible(10)) {
                                         err = -ERESTARTSYS;
                                         goto up_prepare_mutex;
                                 }