Messages in this thread Patch in this message | | | Date | Sun, 20 Mar 2011 23:05:00 +0100 | From | Mirek Slugeň <> | Subject | PATCH: Leadtek DTVb1800H require longer delay for tuner reset |
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Hi,
I am using alot of tuners Leadtek DTV1800H under Linux, minimum 5 devices per one PC with kernel 2.6.37.4. I discovered bug which I can se very often but not always. When device tuner is reseted there is not enough time to do all needed stuff and sometimes (randomly) kernel show this message:
[ 821.369647] cx88[0]/1: IRQ loop detected, disabling interrupts
Patch is again very simple, we need to adjust time in reset function after cx_clear and cx_set calls from 50 to 75 us. I tested this patch on 4 PC with similar problems and all are without this issue.
M. Slugen diff -Naur linux-2.6.37.4.old//drivers/media/video/cx88/cx88-cards.c linux-2.6.37.4/drivers/media/video/cx88/cx88-cards.c --- linux-2.6.37.4.old//drivers/media/video/cx88/cx88-cards.c 2011-03-20 21:30:52.000000000 +0100 +++ linux-2.6.37.4/drivers/media/video/cx88/cx88-cards.c 2011-03-20 22:25:54.710228001 +0100 @@ -3019,9 +3019,9 @@ cx_set(MO_GP1_IO, 0x1010); mdelay(50); cx_clear(MO_GP1_IO, 0x10); - mdelay(50); + mdelay(75); cx_set(MO_GP1_IO, 0x10); - mdelay(50); + mdelay(75); return 0; } return -EINVAL; | |