diff options
Diffstat (limited to 'drivers/media/dvb-frontends/stv0367.c')
| -rw-r--r-- | drivers/media/dvb-frontends/stv0367.c | 34 |
1 files changed, 23 insertions, 11 deletions
diff --git a/drivers/media/dvb-frontends/stv0367.c b/drivers/media/dvb-frontends/stv0367.c index 2a8aaeb1112..45877273942 100644 --- a/drivers/media/dvb-frontends/stv0367.c +++ b/drivers/media/dvb-frontends/stv0367.c @@ -33,6 +33,9 @@ #include "stv0367_regs.h" #include "stv0367_priv.h" +/* Max transfer size done by I2C transfer functions */ +#define MAX_XFER_SIZE 64 + static int stvdebug; module_param_named(debug, stvdebug, int, 0644); @@ -767,7 +770,7 @@ static struct st_register def0367cab[STV0367CAB_NBREGS] = { static int stv0367_writeregs(struct stv0367_state *state, u16 reg, u8 *data, int len) { - u8 buf[len + 2]; + u8 buf[MAX_XFER_SIZE]; struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, @@ -776,6 +779,14 @@ int stv0367_writeregs(struct stv0367_state *state, u16 reg, u8 *data, int len) }; int ret; + if (2 + len > sizeof(buf)) { + printk(KERN_WARNING + "%s: i2c wr reg=%04x: len=%d is too big!\n", + KBUILD_MODNAME, reg, len); + return -EINVAL; + } + + buf[0] = MSB(reg); buf[1] = LSB(reg); memcpy(buf + 2, data, len); @@ -879,7 +890,8 @@ static u8 stv0367_readbits(struct stv0367_state *state, u32 label) return val; } -u8 stv0367_getbits(u8 reg, u32 label) +#if 0 /* Currently, unused */ +static u8 stv0367_getbits(u8 reg, u32 label) { u8 mask, pos; @@ -887,7 +899,7 @@ u8 stv0367_getbits(u8 reg, u32 label) return (reg & mask) >> pos; } - +#endif static int stv0367ter_gate_ctrl(struct dvb_frontend *fe, int enable) { struct stv0367_state *state = fe->demodulator_priv; @@ -1263,8 +1275,8 @@ stv0367_ter_signal_type stv0367ter_check_cpamp(struct stv0367_state *state, return CPAMPStatus; } -enum -stv0367_ter_signal_type stv0367ter_lock_algo(struct stv0367_state *state) +static enum stv0367_ter_signal_type +stv0367ter_lock_algo(struct stv0367_state *state) { enum stv0367_ter_signal_type ret_flag; short int wd, tempo; @@ -1528,7 +1540,7 @@ static int stv0367ter_sleep(struct dvb_frontend *fe) return stv0367ter_standby(fe, 1); } -int stv0367ter_init(struct dvb_frontend *fe) +static int stv0367ter_init(struct dvb_frontend *fe) { struct stv0367_state *state = fe->demodulator_priv; struct stv0367ter_state *ter_state = state->ter_state; @@ -2378,9 +2390,9 @@ static u32 stv0367cab_get_adc_freq(struct dvb_frontend *fe, u32 ExtClk_Hz) return ADCClk_Hz; } -enum stv0367cab_mod stv0367cab_SetQamSize(struct stv0367_state *state, - u32 SymbolRate, - enum stv0367cab_mod QAMSize) +static enum stv0367cab_mod stv0367cab_SetQamSize(struct stv0367_state *state, + u32 SymbolRate, + enum stv0367cab_mod QAMSize) { /* Set QAM size */ stv0367_writebits(state, F367CAB_QAM_MODE, QAMSize); @@ -2762,7 +2774,7 @@ static int stv0367cab_sleep(struct dvb_frontend *fe) return stv0367cab_standby(fe, 1); } -int stv0367cab_init(struct dvb_frontend *fe) +static int stv0367cab_init(struct dvb_frontend *fe) { struct stv0367_state *state = fe->demodulator_priv; struct stv0367cab_state *cab_state = state->cab_state; @@ -2918,7 +2930,7 @@ enum stv0367_cab_signal_type stv0367cab_algo(struct stv0367_state *state, if (tuner_lock == 0) return FE_367CAB_NOTUNER; #endif - /* Relase the TRL to start demodulator acquisition */ + /* Release the TRL to start demodulator acquisition */ /* Wait for QAM lock */ LockTime = 0; stv0367_writereg(state, R367CAB_CTRL_1, 0x00); |