diff options
| author | Michael Krufky <mkrufky@linuxtv.org> | 2008-05-10 14:34:09 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2008-05-14 02:56:46 -0300 |
| commit | 48723543aff1f46091840222490ded5fe09c0e37 (patch) | |
| tree | ce076b78ecae43f7ae22849277db6d496780cc8b /drivers/media/common/tuners/xc5000.h | |
| parent | 07c87a833e9ef92280ed24ab85cd4eb49cbca9c0 (diff) | |
V4L/DVB (7893): xc5000: bug-fix: allow multiple devices in a single system
The current code passes a context pointer in the xc5000_config struct.
This context pointer is used in the tuner_callback function, used to
reset the device after firmware download.
The xc5000_config struct is a static structure, whose .priv member was
being assigned before calling xc5000_attach(). If there are more than
one of the same device type installed on a single system, the last one
to assign xc5000_config.priv will "win", and all others will cease to
function properly.
This patch passes the context pointer in xc5000_attach() rather that
storing it within the static struct xc5000_config.
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/common/tuners/xc5000.h')
| -rw-r--r-- | drivers/media/common/tuners/xc5000.h | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/drivers/media/common/tuners/xc5000.h b/drivers/media/common/tuners/xc5000.h index 0ee80f9d19b8..c910715addc9 100644 --- a/drivers/media/common/tuners/xc5000.h +++ b/drivers/media/common/tuners/xc5000.h @@ -31,29 +31,31 @@ struct xc5000_config { u8 i2c_address; u32 if_khz; - /* For each bridge framework, when it attaches either analog or digital, - * it has to store a reference back to its _core equivalent structure, - * so that it can service the hardware by steering gpio's etc. - * Each bridge implementation is different so cast priv accordingly. - * The xc5000 driver cares not for this value, other than ensuring - * it's passed back to a bridge during tuner_callback(). - */ - void *priv; int (*tuner_callback) (void *priv, int command, int arg); }; /* xc5000 callback command */ #define XC5000_TUNER_RESET 0 +/* For each bridge framework, when it attaches either analog or digital, + * it has to store a reference back to its _core equivalent structure, + * so that it can service the hardware by steering gpio's etc. + * Each bridge implementation is different so cast devptr accordingly. + * The xc5000 driver cares not for this value, other than ensuring + * it's passed back to a bridge during tuner_callback(). + */ + #if defined(CONFIG_MEDIA_TUNER_XC5000) || \ (defined(CONFIG_MEDIA_TUNER_XC5000_MODULE) && defined(MODULE)) extern struct dvb_frontend* xc5000_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, - struct xc5000_config *cfg); + struct xc5000_config *cfg, + void *devptr); #else static inline struct dvb_frontend* xc5000_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, - struct xc5000_config *cfg) + struct xc5000_config *cfg, + void *devptr) { printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__); return NULL; |