linux-kernel - [PATCH] sun/niu: fix wrong RXMAC_BC_FRM_CNT

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Date:   Fri,  5 Mar 2021 20:02:12 +0300
From:   Denis Efremov <efremov@...ux.com>
To:     "David S. Miller" <davem@...emloft.net>
Cc:     Denis Efremov <efremov@...ux.com>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] sun/niu: fix wrong RXMAC_BC_FRM_CNT_COUNT count

RXMAC_BC_FRM_CNT_COUNT added to mp->rx_bcasts twice in a row
in niu_xmac_interrupt(). Remove the second addition.

Signed-off-by: Denis Efremov <efremov@...ux.com>
---
I don't know the code of the dirver, but this looks like a real bug.
Otherwise, it's more readable as:
   mp->rx_bcasts += RXMAC_BC_FRM_CNT_COUNT * 2;

 drivers/net/ethernet/sun/niu.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/net/ethernet/sun/niu.c b/drivers/net/ethernet/sun/niu.c
index 68695d4afacd..707ccdd03b19 100644
--- a/drivers/net/ethernet/sun/niu.c
+++ b/drivers/net/ethernet/sun/niu.c
@@ -3931,8 +3931,6 @@ static void niu_xmac_interrupt(struct niu *np)
 		mp->rx_mcasts += RXMAC_MC_FRM_CNT_COUNT;
 	if (val & XRXMAC_STATUS_RXBCAST_CNT_EXP)
 		mp->rx_bcasts += RXMAC_BC_FRM_CNT_COUNT;
-	if (val & XRXMAC_STATUS_RXBCAST_CNT_EXP)
-		mp->rx_bcasts += RXMAC_BC_FRM_CNT_COUNT;
 	if (val & XRXMAC_STATUS_RXHIST1_CNT_EXP)
 		mp->rx_hist_cnt1 += RXMAC_HIST_CNT1_COUNT;
 	if (val & XRXMAC_STATUS_RXHIST2_CNT_EXP)
-- 
2.26.2