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rtlwifi: silence underflow warning 

My static checker complains that we have an upper bound but no lower
bound.  I suspect neither are really required but it doesn't hurt to add
a check for negatives.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Dan Carpenter 2017-09-29 10:52:34 +03:00 committed by Kalle Valo
parent fc09785de0
commit 64e79426c2
1 changed files with 2 additions and 1 deletions
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3
drivers/net/wireless/realtek/rtlwifi/core.c
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@ -453,7 +453,8 @@ static void _rtl_add_wowlan_patterns(struct ieee80211_hw *hw,
for (i = 0; i < wow->n_patterns; i++) { for (i = 0; i < wow->n_patterns; i++) {
memset(&rtl_pattern, 0, sizeof(struct rtl_wow_pattern)); memset(&rtl_pattern, 0, sizeof(struct rtl_wow_pattern));
memset(mask, 0, MAX_WOL_BIT_MASK_SIZE); memset(mask, 0, MAX_WOL_BIT_MASK_SIZE);
if (patterns[i].pattern_len > MAX_WOL_PATTERN_SIZE) { if (patterns[i].pattern_len < 0 ||
patterns[i].pattern_len > MAX_WOL_PATTERN_SIZE) {
RT_TRACE(rtlpriv, COMP_POWER, DBG_WARNING, RT_TRACE(rtlpriv, COMP_POWER, DBG_WARNING,
"Pattern[%d] is too long\n", i); "Pattern[%d] is too long\n", i);
continue; continue;