linux-kernel - [PATCH v2] drivers/net/ethernet/intel/e100: check the return value of e100_exec

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Date:   Fri, 16 Sep 2022 17:10:27 -0700
From:   Li Zhong <floridsleeves@...il.com>
To:     linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        intel-wired-lan@...ts.osuosl.org
Cc:     pabeni@...hat.com, kuba@...nel.org, edumazet@...gle.com,
        davem@...emloft.net, anthony.l.nguyen@...el.com,
        jesse.brandeburg@...el.com, Li Zhong <floridsleeves@...il.com>
Subject: [PATCH v2] drivers/net/ethernet/intel/e100: check the return value of e100_exec_cmd()

Check the return value of e100_exec_cmd() which could return error code
when execution fails.

Signed-off-by: Li Zhong <floridsleeves@...il.com>
---
 drivers/net/ethernet/intel/e100.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/e100.c b/drivers/net/ethernet/intel/e100.c
index 11a884aa5082..0d133cd4d01b 100644
--- a/drivers/net/ethernet/intel/e100.c
+++ b/drivers/net/ethernet/intel/e100.c
@@ -1911,7 +1911,9 @@ static inline void e100_start_receiver(struct nic *nic, struct rx *rx)
 
 	/* (Re)start RU if suspended or idle and RFA is non-NULL */
 	if (rx->skb) {
-		e100_exec_cmd(nic, ruc_start, rx->dma_addr);
+		if (e100_exec_cmd(nic, ruc_start, rx->dma_addr))
+			netif_printk(nic, tx_err, KERN_DEBUG, nic->netdev,
+			     "exec ruc_start failed\n");
 		nic->ru_running = RU_RUNNING;
 	}
 }
-- 
2.25.1