V4L/DVB (9620): tvaudio: use a direct reference for chip description

Instead of storing the pointer for the proper entry at chip description
table, the driver were storing an indirect reference, by using an index.
Better to reference directly the data.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/tvaudio.c

@@ -112,8 +112,9 @@ static struct CHIPDESC chiplist[];
 struct CHIPSTATE {
 	struct i2c_client *c;
 
-	/* index into CHIPDESC array */
-	int type;
+	/* chip-specific description - should point to
+	   an entry at CHIPDESC table */
+	struct CHIPDESC *desc;
 
 	/* shadow register set */
 	audiocmd   shadow;
@@ -264,7 +265,7 @@ static void chip_thread_wake(unsigned long data)
 static int chip_thread(void *data)
 {
 	struct CHIPSTATE *chip = data;
-	struct CHIPDESC  *desc = chiplist + chip->type;
+	struct CHIPDESC  *desc = chip->desc;
 	int mode;
 
 	v4l_dbg(1, debug, chip->c, "%s: thread started\n", chip->c->name);
@@ -1087,7 +1088,7 @@ static int tda8425_shift12(int val) { return (val >> 12) | 0xf0; }
 
 static int tda8425_initialize(struct CHIPSTATE *chip)
 {
-	struct CHIPDESC *desc = chiplist + chip->type;
+	struct CHIPDESC *desc = chip->desc;
 	int inputmap[4] = { /* tuner	*/ TDA8425_S1_CH2, /* radio  */ TDA8425_S1_CH1,
 			    /* extern	*/ TDA8425_S1_CH1, /* intern */ TDA8425_S1_OFF};
 
@@ -1503,7 +1504,7 @@ static int chip_probe(struct i2c_client *client, const struct i2c_device_id *id)
 	/* fill required data structures */
 	if (!id)
 		strlcpy(client->name, desc->name, I2C_NAME_SIZE);
-	chip->type = desc-chiplist;
+	chip->desc = desc;
 	chip->shadow.count = desc->registers+1;
 	chip->prevmode = -1;
 	chip->audmode = V4L2_TUNER_MODE_LANG1;
@@ -1590,7 +1591,7 @@ static int chip_remove(struct i2c_client *client)
 static int tvaudio_get_ctrl(struct CHIPSTATE *chip,
 			    struct v4l2_control *ctrl)
 {
-	struct CHIPDESC *desc = chiplist + chip->type;
+	struct CHIPDESC *desc = chip->desc;
 
 	switch (ctrl->id) {
 	case V4L2_CID_AUDIO_MUTE:
@@ -1630,7 +1631,7 @@ static int tvaudio_get_ctrl(struct CHIPSTATE *chip,
 static int tvaudio_set_ctrl(struct CHIPSTATE *chip,
 			    struct v4l2_control *ctrl)
 {
-	struct CHIPDESC *desc = chiplist + chip->type;
+	struct CHIPDESC *desc = chip->desc;
 
 	switch (ctrl->id) {
 	case V4L2_CID_AUDIO_MUTE:
@@ -1706,7 +1707,7 @@ static int chip_command(struct i2c_client *client,
 			unsigned int cmd, void *arg)
 {
 	struct CHIPSTATE *chip = i2c_get_clientdata(client);
-	struct CHIPDESC  *desc = chiplist + chip->type;
+	struct CHIPDESC  *desc = chip->desc;
 
 	v4l_dbg(1, debug, chip->c, "%s: chip_command 0x%x\n", chip->c->name, cmd);