diff options
Diffstat (limited to 'drivers/media/dvb-frontends/ascot2e.c')
| -rw-r--r-- | drivers/media/dvb-frontends/ascot2e.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/media/dvb-frontends/ascot2e.c b/drivers/media/dvb-frontends/ascot2e.c index ae7e463c2f9b..f770f6a2c987 100644 --- a/drivers/media/dvb-frontends/ascot2e.c +++ b/drivers/media/dvb-frontends/ascot2e.c @@ -26,6 +26,8 @@ #include "ascot2e.h" #include "dvb_frontend.h" +#define MAX_WRITE_REGSIZE 10 + enum ascot2e_state { STATE_UNKNOWN, STATE_SLEEP, @@ -120,16 +122,22 @@ static int ascot2e_write_regs(struct ascot2e_priv *priv, u8 reg, const u8 *data, u32 len) { int ret; - u8 buf[len+1]; + u8 buf[MAX_WRITE_REGSIZE + 1]; struct i2c_msg msg[1] = { { .addr = priv->i2c_address, .flags = 0, - .len = sizeof(buf), + .len = len + 1, .buf = buf, } }; + if (len + 1 >= sizeof(buf)) { + dev_warn(&priv->i2c->dev,"wr reg=%04x: len=%d is too big!\n", + reg, len + 1); + return -E2BIG; + } + ascot2e_i2c_debug(priv, reg, 1, data, len); buf[0] = reg; memcpy(&buf[1], data, len); |