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media: dib9000: delete some unused broken code 

The dib9000_remove_slave_frontend() function isn't used.

I was reviewing it because my static checker claims it writes one
element beyond the end of the array.  That's a false positive.  What it
actually does is, if there are two or more front ends, then it prints a
debug message to say that it removed the first one, stored in
state->fe[1], and then it "removes" (scare quotes on purpose) the second
one, stored in state->fe[2].  Deleting a front end from the middle is
not really supported and breaks code like dib9000_release() which
assumes the first NULL front end marks the end of the list.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Dan Carpenter 2017-08-26 02:18:16 -04:00 committed by Mauro Carvalho Chehab
parent cd3bef00c2
commit 5af478341f
2 changed files with 0 additions and 25 deletions
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18
drivers/media/dvb-frontends/dib9000.c
View File

@ -2462,24 +2462,6 @@ int dib9000_set_slave_frontend(struct dvb_frontend *fe, struct dvb_frontend *fe_
}
EXPORT_SYMBOL(dib9000_set_slave_frontend);
int dib9000_remove_slave_frontend(struct dvb_frontend *fe)
{
struct dib9000_state *state = fe->demodulator_priv;
u8 index_frontend = 1;
while ((index_frontend < MAX_NUMBER_OF_FRONTENDS) && (state->fe[index_frontend] != NULL))
index_frontend++;
if (index_frontend != 1) {
dprintk("remove slave fe %p (index %i)\n", state->fe[index_frontend - 1], index_frontend - 1);
state->fe[index_frontend] = NULL;
return 0;
}
dprintk("no frontend to be removed\n");
return -ENODEV;
}
EXPORT_SYMBOL(dib9000_remove_slave_frontend);
struct dvb_frontend *dib9000_get_slave_frontend(struct dvb_frontend *fe, int slave_index)
{
struct dib9000_state *state = fe->demodulator_priv;

7
drivers/media/dvb-frontends/dib9000.h
View File

@ -37,7 +37,6 @@ extern int dib9000_fw_pid_filter_ctrl(struct dvb_frontend *fe, u8 onoff);
extern int dib9000_fw_pid_filter(struct dvb_frontend *fe, u8 id, u16 pid, u8 onoff);
extern int dib9000_firmware_post_pll_init(struct dvb_frontend *fe);
extern int dib9000_set_slave_frontend(struct dvb_frontend *fe, struct dvb_frontend *fe_slave);
extern int dib9000_remove_slave_frontend(struct dvb_frontend *fe);
extern struct dvb_frontend *dib9000_get_slave_frontend(struct dvb_frontend *fe, int slave_index);
extern struct i2c_adapter *dib9000_get_component_bus_interface(struct dvb_frontend *fe);
extern int dib9000_set_i2c_adapter(struct dvb_frontend *fe, struct i2c_adapter *i2c);
@ -97,12 +96,6 @@ static inline int dib9000_set_slave_frontend(struct dvb_frontend *fe, struct dvb
return -ENODEV;
}
static inline int dib9000_remove_slave_frontend(struct dvb_frontend *fe)
{
printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
return -ENODEV;
}
static inline struct dvb_frontend *dib9000_get_slave_frontend(struct dvb_frontend *fe, int slave_index)
{
printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);