staging: rtl8192u: Fix potential infinite loop

stable inclusion
from stable-5.10.37
commit 40d622b31bafc64a83f0992f7be2e90576f950e7
bugzilla: 51868
CVE: NA

--------------------------------

[ Upstream commit f9b9263a ]

The for-loop iterates with a u8 loop counter i and compares this
with the loop upper limit of riv->ieee80211->LinkDetectInfo.SlotNum
that is a u16 type. There is a potential infinite loop if SlotNum
is larger than the u8 loop counter. Fix this by making the loop
counter the same type as SlotNum.

Addresses-Coverity: ("Infinite loop")
Fixes: 8fc8598e ("Staging: Added Realtek rtl8192u driver to staging")
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20210407150308.496623-1-colin.king@canonical.comSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NChen Jun <chenjun102@huawei.com>
Acked-by: NWeilong Chen <chenweilong@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/staging/rtl8192u/r8192U_core.c

@@ -3208,7 +3208,7 @@ static void rtl819x_update_rxcounts(struct r8192_priv *priv, u32 *TotalRxBcnNum,
 			     u32 *TotalRxDataNum)
 {
 	u16			SlotIndex;
-	u8			i;
+	u16			i;
 
 	*TotalRxBcnNum = 0;
 	*TotalRxDataNum = 0;