linux-kernel - [PATCH -next] wifi: ath12k: dp_mon: Fix unsigned comparison with less than zero

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Message-Id: <20230215011453.73466-1-yang.lee@linux.alibaba.com>
Date:   Wed, 15 Feb 2023 09:14:53 +0800
From:   Yang Li <yang.lee@...ux.alibaba.com>
To:     kuba@...nel.org
Cc:     davem@...emloft.net, kvalo@...nel.org, edumazet@...gle.com,
        pabeni@...hat.com, ath12k@...ts.infradead.org,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Yang Li <yang.lee@...ux.alibaba.com>,
        Abaci Robot <abaci@...ux.alibaba.com>
Subject: [PATCH -next] wifi: ath12k: dp_mon: Fix unsigned comparison with less than zero

The return value from the call to idr_alloc() is int.
However, the return value is being assigned to an unsigned
int variable 'buf_id', so making 'buf_id' an int.

Eliminate the following warning:
./drivers/net/wireless/ath/ath12k/dp_mon.c:1300:15-21: WARNING: Unsigned expression compared with zero: buf_id < 0

Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=4060
Signed-off-by: Yang Li <yang.lee@...ux.alibaba.com>
---
 drivers/net/wireless/ath/ath12k/dp_mon.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath12k/dp_mon.c b/drivers/net/wireless/ath/ath12k/dp_mon.c
index a214797c96a2..8b3f0769dd58 100644
--- a/drivers/net/wireless/ath/ath12k/dp_mon.c
+++ b/drivers/net/wireless/ath/ath12k/dp_mon.c
@@ -1268,7 +1268,8 @@ int ath12k_dp_mon_buf_replenish(struct ath12k_base *ab,
 	struct sk_buff *skb;
 	struct hal_srng *srng;
 	dma_addr_t paddr;
-	u32 cookie, buf_id;
+	u32 cookie;
+	int buf_id;
 
 	srng = &ab->hal.srng_list[buf_ring->refill_buf_ring.ring_id];
 	spin_lock_bh(&srng->lock);
-- 
2.20.1.7.g153144c