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V4L/DVB (8950): xc5000: prevent an OOPS if analog driver is unloaded while digital is in use

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Prevent an OOPS if xc5000_attach was called by tuner.ko before being called by
the DVB adapter driver. The OOPS occurs when a digital tune request is made
after tuner.ko is unloaded.

When tuner.ko is unloaded, it takes the xc5000_config structure with it.

Rather than storing a pointer to the xc5000_config structure, just store the
if_khz and tuner_callback inside the xc5000_priv internal state structure.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Michael Krufky 2008-09-06 13:54:45 -03:00 committed by Mauro Carvalho Chehab
parent 89fd28545c
commit 2a6003c207
1 changed files with 8 additions and 8 deletions
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16
drivers/media/common/tuners/xc5000.c
View file

@ -50,17 +50,17 @@ static LIST_HEAD(hybrid_tuner_instance_list);
#define XC5000_DEFAULT_FIRMWARE_SIZE 12332
struct xc5000_priv {
struct xc5000_config *cfg;
struct tuner_i2c_props i2c_props;
struct list_head hybrid_tuner_instance_list;
u32 if_khz;
u32 freq_hz;
u32 bandwidth;
u8 video_standard;
u8 rf_mode;
void *devptr;
int (*tuner_callback) (void *priv, int command, int arg);
};
/* Misc Defines */
@ -233,9 +233,8 @@ static void xc5000_TunerReset(struct dvb_frontend *fe)
dprintk(1, "%s()\n", __func__);
if (priv->cfg->tuner_callback) {
ret = priv->cfg->tuner_callback(priv->devptr,
XC5000_TUNER_RESET, 0);
if (priv->tuner_callback) {
ret = priv->tuner_callback(priv->devptr, XC5000_TUNER_RESET, 0);
if (ret)
printk(KERN_ERR "xc5000: reset failed\n");
} else
@ -692,10 +691,10 @@ static int xc5000_set_params(struct dvb_frontend *fe,
return -EREMOTEIO;
}
ret = xc_set_IF_frequency(priv, priv->cfg->if_khz);
ret = xc_set_IF_frequency(priv, priv->if_khz);
if (ret != XC_RESULT_SUCCESS) {
printk(KERN_ERR "xc5000: xc_Set_IF_frequency(%d) failed\n",
priv->cfg->if_khz);
priv->if_khz);
return -EIO;
}
@ -972,9 +971,10 @@ struct dvb_frontend *xc5000_attach(struct dvb_frontend *fe,
break;
case 1:
/* new tuner instance */
priv->cfg = cfg;
priv->bandwidth = BANDWIDTH_6_MHZ;
priv->devptr = devptr;
priv->if_khz = cfg->if_khz;
priv->tuner_callback = cfg->tuner_callback;
fe->tuner_priv = priv;
break;