linux-kernel - [PATCH] qlcnic: check pci_reset

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Message-Id: <20230331080605.42961-1-den-plotnikov@yandex-team.ru>
Date:   Fri, 31 Mar 2023 11:06:05 +0300
From:   Denis Plotnikov <den-plotnikov@...dex-team.ru>
To:     netdev@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, shshaikh@...vell.com,
        manishc@...vell.com, GR-Linux-NIC-Dev@...vell.com,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, den-plotnikov@...dex-team.ru
Subject: [PATCH] qlcnic: check pci_reset_function result

Static code analyzer complains to unchecked return value.
It seems that pci_reset_function return something meaningful
only if "reset_methods" is set.
Even if reset_methods isn't used check the return value to avoid
possible bugs leading to undefined behavior in the future.

Signed-off-by: Denis Plotnikov <den-plotnikov@...dex-team.ru>
---
 drivers/net/ethernet/qlogic/qlcnic/qlcnic_ctx.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_ctx.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_ctx.c
index 87f76bac2e463..39ecfc1a1dbd0 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_ctx.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_ctx.c
@@ -628,7 +628,9 @@ int qlcnic_fw_create_ctx(struct qlcnic_adapter *dev)
 	int i, err, ring;
 
 	if (dev->flags & QLCNIC_NEED_FLR) {
-		pci_reset_function(dev->pdev);
+		err = pci_reset_function(dev->pdev);
+		if (err && err != -ENOTTY)
+			return err;
 		dev->flags &= ~QLCNIC_NEED_FLR;
 	}
 
-- 
2.25.1