diff options
Diffstat (limited to 'drivers/media/dvb-frontends/tda18271c2dd.c')
| -rw-r--r-- | drivers/media/dvb-frontends/tda18271c2dd.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/media/dvb-frontends/tda18271c2dd.c b/drivers/media/dvb-frontends/tda18271c2dd.c index d281f77d5c2..2c54586ac07 100644 --- a/drivers/media/dvb-frontends/tda18271c2dd.c +++ b/drivers/media/dvb-frontends/tda18271c2dd.c @@ -34,6 +34,9 @@ #include "dvb_frontend.h" #include "tda18271c2dd.h" +/* Max transfer size done by I2C transfer functions */ +#define MAX_XFER_SIZE 64 + struct SStandardParam { s32 m_IFFrequency; u32 m_BandWidth; @@ -139,11 +142,18 @@ static int i2c_write(struct i2c_adapter *adap, u8 adr, u8 *data, int len) static int WriteRegs(struct tda_state *state, u8 SubAddr, u8 *Regs, u16 nRegs) { - u8 data[nRegs+1]; + u8 data[MAX_XFER_SIZE]; + + if (1 + nRegs > sizeof(data)) { + printk(KERN_WARNING + "%s: i2c wr: len=%d is too big!\n", + KBUILD_MODNAME, nRegs); + return -EINVAL; + } data[0] = SubAddr; memcpy(data + 1, Regs, nRegs); - return i2c_write(state->i2c, state->adr, data, nRegs+1); + return i2c_write(state->i2c, state->adr, data, nRegs + 1); } static int WriteReg(struct tda_state *state, u8 SubAddr, u8 Reg) |