linux-kernel - [PATCH v2 1/2] PCI: vmd: Fix one uninitialized symbol error reported by Smatch

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Message-Id: <20230420094332.1507900-2-korantwork@gmail.com>
Date:   Thu, 20 Apr 2023 17:43:31 +0800
From:   korantwork@...il.com
To:     dlemoal@...nel.org, helgaas@...nel.org,
        nirmal.patel@...ux.intel.com, kbusch@...nel.org,
        jonathan.derrick@...ux.dev, lpieralisi@...nel.org
Cc:     linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        Xinghui Li <korantli@...cent.com>,
        Dan Carpenter <error27@...il.com>
Subject: [PATCH v2 1/2] PCI: vmd: Fix one uninitialized symbol error reported by Smatch

From: Xinghui Li <korantli@...cent.com>

There is one uninitialized symbol error reported by smatch:
"drivers/pci/controller/vmd.c:931 vmd_enable_domain()
error: uninitialized symbol 'ret'."

Fix it by assigning ret with pci_reset_bus return.

Fixes: 0a584655ef89 ("PCI: vmd: Fix secondary bus reset for Intel bridges")
Reported-by: Dan Carpenter <error27@...il.com>
Signed-off-by: Xinghui Li <korantli@...cent.com>
---
 drivers/pci/controller/vmd.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/controller/vmd.c b/drivers/pci/controller/vmd.c
index 990630ec57c6..1a36e9a52b93 100644
--- a/drivers/pci/controller/vmd.c
+++ b/drivers/pci/controller/vmd.c
@@ -927,7 +927,8 @@ static int vmd_enable_domain(struct vmd_dev *vmd, unsigned long features)
 		if (!list_empty(&child->devices)) {
 			dev = list_first_entry(&child->devices,
 					       struct pci_dev, bus_list);
-			if (pci_reset_bus(dev))
+			ret = pci_reset_bus(dev);
+			if (ret)
 				pci_warn(dev, "can't reset device: %d\n", ret);
 
 			break;
-- 
2.31.1