diff options
| author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-09-11 11:37:51 -0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-03-21 12:43:13 -0700 |
| commit | b73a9cba501f233a005392d971208033c6fbef0d (patch) | |
| tree | 62cec4e268d1c25f5d9f1ad442652cfd55614621 /drivers/media | |
| parent | ef40b724e656c3e7dd46b7b57f1f735baf4cd074 (diff) | |
V4L/DVB: cx231xx: Avoid an OOPS when card is unknown (card=0)
commit c10469c637602c2385e2993d8c730cc44fd47d23 upstream.
As reported by: Carlos Americo Domiciano <c_domiciano@yahoo.com.br>:
[ 220.033500] cx231xx v4l2 driver loaded.
[ 220.033571] cx231xx #0: New device Conexant Corporation Polaris AV Capturb @ 480 Mbps (1554:5010) with 6 interfaces
[ 220.033577] cx231xx #0: registering interface 0
[ 220.033591] cx231xx #0: registering interface 1
[ 220.033654] cx231xx #0: registering interface 6
[ 220.033910] cx231xx #0: Identified as Unknown CX231xx video grabber (card=0)
[ 220.033946] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 220.033955] IP: [<ffffffffa0d3c8bd>] cx231xx_pre_card_setup+0x5d/0xb0 [cx231xx]
Thanks-to: Carlos Americo Domiciano <c_domiciano@yahoo.com.br>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/video/cx231xx/cx231xx-cards.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/media/video/cx231xx/cx231xx-cards.c b/drivers/media/video/cx231xx/cx231xx-cards.c index a5490823500..dd2a275f526 100644 --- a/drivers/media/video/cx231xx/cx231xx-cards.c +++ b/drivers/media/video/cx231xx/cx231xx-cards.c @@ -225,14 +225,16 @@ void cx231xx_pre_card_setup(struct cx231xx *dev) dev->board.name, dev->model); /* set the direction for GPIO pins */ - cx231xx_set_gpio_direction(dev, dev->board.tuner_gpio->bit, 1); - cx231xx_set_gpio_value(dev, dev->board.tuner_gpio->bit, 1); - cx231xx_set_gpio_direction(dev, dev->board.tuner_sif_gpio, 1); + if (dev->board.tuner_gpio) { + cx231xx_set_gpio_direction(dev, dev->board.tuner_gpio->bit, 1); + cx231xx_set_gpio_value(dev, dev->board.tuner_gpio->bit, 1); + cx231xx_set_gpio_direction(dev, dev->board.tuner_sif_gpio, 1); - /* request some modules if any required */ + /* request some modules if any required */ - /* reset the Tuner */ - cx231xx_gpio_set(dev, dev->board.tuner_gpio); + /* reset the Tuner */ + cx231xx_gpio_set(dev, dev->board.tuner_gpio); + } /* set the mode to Analog mode initially */ cx231xx_set_mode(dev, CX231XX_ANALOG_MODE); |