diff options
Diffstat (limited to 'drivers/media/dvb-frontends/mt312.c')
| -rw-r--r-- | drivers/media/dvb-frontends/mt312.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/media/dvb-frontends/mt312.c b/drivers/media/dvb-frontends/mt312.c index ec388c1d6913..a74ac0ddb833 100644 --- a/drivers/media/dvb-frontends/mt312.c +++ b/drivers/media/dvb-frontends/mt312.c @@ -36,6 +36,8 @@ #include "mt312_priv.h" #include "mt312.h" +/* Max transfer size done by I2C transfer functions */ +#define MAX_XFER_SIZE 64 struct mt312_state { struct i2c_adapter *i2c; @@ -96,9 +98,15 @@ static int mt312_write(struct mt312_state *state, const enum mt312_reg_addr reg, const u8 *src, const size_t count) { int ret; - u8 buf[count + 1]; + u8 buf[MAX_XFER_SIZE]; struct i2c_msg msg; + if (1 + count > sizeof(buf)) { + printk(KERN_WARNING + "mt312: write: len=%zd is too big!\n", count); + return -EINVAL; + } + if (debug) { int i; dprintk("W(%d):", reg & 0x7f); |