[ALSA] usb-audio: increase number of packets per URB

To decrease the USB interrupts rate, increase both the default and the
maximum number of packets per URB.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
index 664dd4c21e66ed9bfbec750ddbc31faec3685204..49248fa7aef47adaa9884aada5ebf593f8838d72 100644 (file)
--- a/sound/usb/usbaudio.c
+++ b/sound/usb/usbaudio.c
@@ -68,7 +68,7 @@ static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;     /* ID for this card */
 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;     /* Enable this card */
 static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Vendor ID for this card */
 static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Product ID for this card */
-static int nrpacks = 4;                /* max. number of packets per urb */
+static int nrpacks = 8;                /* max. number of packets per urb */
 static int async_unlink = 1;
 static int device_setup[SNDRV_CARDS]; /* device parameter for this card*/
 
@@ -100,7 +100,7 @@ MODULE_PARM_DESC(device_setup, "Specific device setup (if needed).");
  *
  */
 
-#define MAX_PACKS      10
+#define MAX_PACKS      20
 #define MAX_PACKS_HS   (MAX_PACKS * 8) /* in high speed mode */
 #define MAX_URBS       8
 #define SYNC_URBS      4       /* always four urbs for sync */