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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 <dheitmueller@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Devin Heitmueller 2010-01-22 01:53:17 -03:00 committed by Mauro Carvalho Chehab
parent f0dbf82bf1
commit 33c02facb5
1 changed files with 2 additions and 2 deletions
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4
drivers/media/video/em28xx/em28xx.h
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@ -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