From 33c02facb5a3123212587295cc1c241ee7e03adb Mon Sep 17 00:00:00 2001 From: Devin Heitmueller Date: Fri, 22 Jan 2010 01:53:17 -0300 Subject: [PATCH] V4L/DVB: em28xx: adjust number of packets per URB Increase the packets per URB count from 40 to 64. I suspect that whoever was looking at the usbsnoop captures saw "0x40" packets and mistook it for "40". As a result of this change, I can see a 25% reduction in the number of interrupts generated via powertop. This work was sponsored by EyeMagnet Limited. Signed-off-by: Devin Heitmueller Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/em28xx/em28xx.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/media/video/em28xx/em28xx.h b/drivers/media/video/em28xx/em28xx.h index ba6fe5daff84..526c06582158 100644 --- a/drivers/media/video/em28xx/em28xx.h +++ b/drivers/media/video/em28xx/em28xx.h @@ -140,10 +140,10 @@ #define EM28XX_NUM_BUFS 5 /* number of packets for each buffer - windows requests only 40 packets .. so we better do the same + windows requests only 64 packets .. so we better do the same this is what I found out for all alternate numbers there! */ -#define EM28XX_NUM_PACKETS 40 +#define EM28XX_NUM_PACKETS 64 #define EM28XX_INTERLACED_DEFAULT 1 -- 2.30.2