From 0be51b4671b3ae3ae544a0bb3d15b55478b55e72 Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Tue, 22 Apr 2008 14:46:10 -0300 Subject: [PATCH] V4L/DVB (7398): Adds an error if priv argument of tuner_callback is NULL Adds a consistency check to avoid OOPS, if tuner_callback priv argument is NULL. Also, simplifies callback codes on cx88. Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/cx88/cx88-cards.c | 55 +++++++++++---------- drivers/media/video/saa7134/saa7134-cards.c | 3 ++ 2 files changed, 32 insertions(+), 26 deletions(-) diff --git a/drivers/media/video/cx88/cx88-cards.c b/drivers/media/video/cx88/cx88-cards.c index 603b3664381a..6b83e3457b70 100644 --- a/drivers/media/video/cx88/cx88-cards.c +++ b/drivers/media/video/cx88/cx88-cards.c @@ -2090,11 +2090,9 @@ static void gdi_eeprom(struct cx88_core *core, u8 *eeprom_data) /* ------------------------------------------------------------------- */ /* some Divco specific stuff */ -static int cx88_dvico_xc2028_callback(void *priv, int command, int arg) +static int cx88_dvico_xc2028_callback(struct cx88_core *core, + int command, int arg) { - struct i2c_algo_bit_data *i2c_algo = priv; - struct cx88_core *core = i2c_algo->data; - switch (command) { case XC2028_TUNER_RESET: cx_write(MO_GP0_IO, 0x101000); @@ -2112,11 +2110,9 @@ static int cx88_dvico_xc2028_callback(void *priv, int command, int arg) /* ----------------------------------------------------------------------- */ /* some Geniatech specific stuff */ -static int cx88_xc3028_geniatech_tuner_callback(void *priv, int command, int mode) +static int cx88_xc3028_geniatech_tuner_callback(struct cx88_core *core, + int command, int mode) { - struct i2c_algo_bit_data *i2c_algo = priv; - struct cx88_core *core = i2c_algo->data; - switch (command) { case XC2028_TUNER_RESET: switch (INPUT(core->input).type) { @@ -2143,11 +2139,9 @@ static int cx88_xc3028_geniatech_tuner_callback(void *priv, int command, int mod /* ------------------------------------------------------------------- */ /* some Divco specific stuff */ -static int cx88_pv_8000gt_callback(void *priv, int command, int arg) +static int cx88_pv_8000gt_callback(struct cx88_core *core, + int command, int arg) { - struct i2c_algo_bit_data *i2c_algo = priv; - struct cx88_core *core = i2c_algo->data; - switch (command) { case XC2028_TUNER_RESET: cx_write(MO_GP2_IO, 0xcf7); @@ -2198,21 +2192,20 @@ static void dvico_fusionhdtv_hybrid_init(struct cx88_core *core) } } -static int cx88_xc2028_tuner_callback(void *priv, int command, int arg) +static int cx88_xc2028_tuner_callback(struct cx88_core *core, + int command, int arg) { - struct i2c_algo_bit_data *i2c_algo = priv; - struct cx88_core *core = i2c_algo->data; - /* Board-specific callbacks */ switch (core->boardnr) { case CX88_BOARD_WINFAST_TV2000_XP_GLOBAL: case CX88_BOARD_POWERCOLOR_REAL_ANGEL: case CX88_BOARD_GENIATECH_X8000_MT: - return cx88_xc3028_geniatech_tuner_callback(priv, command, arg); + return cx88_xc3028_geniatech_tuner_callback(core, + command, arg); case CX88_BOARD_PROLINK_PV_8000GT: - return cx88_pv_8000gt_callback(priv, command, arg); + return cx88_pv_8000gt_callback(core, command, arg); case CX88_BOARD_DVICO_FUSIONHDTV_DVB_T_PRO: - return cx88_dvico_xc2028_callback(priv, command, arg); + return cx88_dvico_xc2028_callback(core, command, arg); } switch (command) { @@ -2246,11 +2239,9 @@ static int cx88_xc2028_tuner_callback(void *priv, int command, int arg) * PCTV HD 800i with an xc5000 sillicon tuner. This is used for both * * analog tuner attach (tuner-core.c) and dvb tuner attach (cx88-dvb.c) */ -static int cx88_xc5000_tuner_callback(void *priv, int command, int arg) +static int cx88_xc5000_tuner_callback(struct cx88_core *core, + int command, int arg) { - struct i2c_algo_bit_data *i2c_algo = priv; - struct cx88_core *core = i2c_algo->data; - switch (core->boardnr) { case CX88_BOARD_PINNACLE_PCTV_HD_800i: if (command == 0) { /* This is the reset command from xc5000 */ @@ -2284,15 +2275,27 @@ static int cx88_xc5000_tuner_callback(void *priv, int command, int arg) int cx88_tuner_callback(void *priv, int command, int arg) { struct i2c_algo_bit_data *i2c_algo = priv; - struct cx88_core *core = i2c_algo->data; + struct cx88_core *core; + + if (!i2c_algo) { + printk(KERN_ERR "cx88: Error - i2c private data undefined.\n"); + return -EINVAL; + } + + core = i2c_algo->data; + + if (!core) { + printk(KERN_ERR "cx88: Error - device struct undefined.\n"); + return -EINVAL; + } switch (core->board.tuner_type) { case TUNER_XC2028: info_printk(core, "Calling XC2028/3028 callback\n"); - return cx88_xc2028_tuner_callback(priv, command, arg); + return cx88_xc2028_tuner_callback(core, command, arg); case TUNER_XC5000: info_printk(core, "Calling XC5000 callback\n"); - return cx88_xc5000_tuner_callback(priv, command, arg); + return cx88_xc5000_tuner_callback(core, command, arg); } err_printk(core, "Error: Calling callback for tuner %d\n", core->board.tuner_type); diff --git a/drivers/media/video/saa7134/saa7134-cards.c b/drivers/media/video/saa7134/saa7134-cards.c index b622d979e634..c323ca005f72 100644 --- a/drivers/media/video/saa7134/saa7134-cards.c +++ b/drivers/media/video/saa7134/saa7134-cards.c @@ -5266,6 +5266,9 @@ int saa7134_tuner_callback(void *priv, int command, int arg) case TUNER_XC2028: return saa7134_xc2028_callback(dev, command, arg); } + } else { + printk(KERN_ERR "saa7134: Error - device struct undefined.\n"); + return -EINVAL; } return -EINVAL; } -- 2.30.2