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staging: rtlwifi: silence underflow warning

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I'm not totally certain that it's necessary to put an upper limit here.
I think it happens at lower levels.  But if we are going to do that then
we should have a lower bound as well.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dan Carpenter 2017-09-29 10:51:17 +03:00 committed by Greg Kroah-Hartman
parent 6e6c6dee6a
commit cfc70e7c60
1 changed files with 2 additions and 1 deletions
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3
drivers/staging/rtlwifi/core.c
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@ -412,7 +412,8 @@ static void _rtl_add_wowlan_patterns(struct ieee80211_hw *hw,
for (i = 0; i < wow->n_patterns; i++) {
memset(&rtl_pattern, 0, sizeof(struct rtl_wow_pattern));
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,
"Pattern[%d] is too long\n", i);
continue;