diff options
Diffstat (limited to 'drivers/media/dvb-frontends/stb0899_drv.c')
| -rw-r--r-- | drivers/media/dvb-frontends/stb0899_drv.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/media/dvb-frontends/stb0899_drv.c b/drivers/media/dvb-frontends/stb0899_drv.c index cc278b3d6d5..2a979cfac14 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); |