I'm not sure if this can underflow but Smatch complains. It seems
harmless to add a check for negatives.
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
diff --git a/drivers/net/wireless/cisco/airo.c b/drivers/net/wireless/cisco/airo.c
index 55456f7..ca3cd21 100644
--- a/drivers/net/wireless/cisco/airo.c
+++ b/drivers/net/wireless/cisco/airo.c
@@ -5794,7 +5794,7 @@ static int airo_set_freq(struct net_device *dev,
fwrq->m = ieee80211_frequency_to_channel(f);
}
/* Setting by channel number */
- if((fwrq->m > 1000) || (fwrq->e > 0))
+ if (fwrq->m < 0 || fwrq->m > 1000 || fwrq->e > 0)
rc = -EOPNOTSUPP;
else {
int channel = fwrq->m;
--
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