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>

diff --git a/drivers/media/dvb-frontends/dib9000.c b/drivers/media/dvb-frontends/dib9000.c
index 17c6f15c7e6812e6ce4f3aae0db5a81159f5fc8d..1b7a4331af058438b046a97dd145e1c45608a042 100644 (file)
--- a/drivers/media/dvb-frontends/dib9000.c
+++ b/drivers/media/dvb-frontends/dib9000.c
@@ -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;

diff --git a/drivers/media/dvb-frontends/dib9000.h b/drivers/media/dvb-frontends/dib9000.h
index b10a70aa7c9fdfcfaed67b367bcd563c06af459d..40883b41e66b5369b8214927cd57bab6133b0673 100644 (file)
--- a/drivers/media/dvb-frontends/dib9000.h
+++ b/drivers/media/dvb-frontends/dib9000.h
@@ -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__);