diff options
Diffstat (limited to 'drivers/media/dvb-frontends/stb0899_drv.c')
| -rw-r--r-- | drivers/media/dvb-frontends/stb0899_drv.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/drivers/media/dvb-frontends/stb0899_drv.c b/drivers/media/dvb-frontends/stb0899_drv.c index cc278b3d6d5..07cd5ea7a03 100644 --- a/drivers/media/dvb-frontends/stb0899_drv.c +++ b/drivers/media/dvb-frontends/stb0899_drv.c @@ -32,6 +32,9 @@ #include "stb0899_priv.h" #include "stb0899_reg.h" +/* Max transfer size done by I2C transfer functions */ +#define MAX_XFER_SIZE 64 + static unsigned int verbose = 0;//1; module_param(verbose, int, 0644); @@ -499,7 +502,7 @@ err: int stb0899_write_regs(struct stb0899_state *state, unsigned int reg, u8 *data, u32 count) { int ret; - u8 buf[2 + count]; + u8 buf[MAX_XFER_SIZE]; struct i2c_msg i2c_msg = { .addr = state->config->demod_address, .flags = 0, @@ -507,6 +510,13 @@ int stb0899_write_regs(struct stb0899_state *state, unsigned int reg, u8 *data, .len = 2 + count }; + if (2 + count > sizeof(buf)) { + printk(KERN_WARNING + "%s: i2c wr reg=%04x: len=%d is too big!\n", + KBUILD_MODNAME, reg, count); + return -EINVAL; + } + buf[0] = reg >> 8; buf[1] = reg & 0xff; memcpy(&buf[2], data, count); @@ -1618,19 +1628,18 @@ static struct dvb_frontend_ops stb0899_ops = { struct dvb_frontend *stb0899_attach(struct stb0899_config *config, struct i2c_adapter *i2c) { struct stb0899_state *state = NULL; - enum stb0899_inversion inversion; state = kzalloc(sizeof (struct stb0899_state), GFP_KERNEL); if (state == NULL) goto error; - inversion = config->inversion; state->verbose = &verbose; state->config = config; state->i2c = i2c; state->frontend.ops = stb0899_ops; state->frontend.demodulator_priv = state; - state->internal.inversion = inversion; + /* use configured inversion as default -- we'll later autodetect inversion */ + state->internal.inversion = config->inversion; stb0899_wakeup(&state->frontend); if (stb0899_get_dev_id(state) == -ENODEV) { |