linux-kernel - [PATCH 3/4] vDPA/ifcvf: Fix return value check for vdpa_alloc

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Date:   Thu, 15 Jul 2021 16:00:25 +0800
From:   Xie Yongji <xieyongji@...edance.com>
To:     mst@...hat.com, jasowang@...hat.com, dan.carpenter@...cle.com
Cc:     virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 3/4] vDPA/ifcvf: Fix return value check for vdpa_alloc_device()

The vdpa_alloc_device() returns an error pointer upon
failure, not NULL. To handle the failure correctly, this
replaces NULL check with IS_ERR() check and propagate the
error upwards.

Fixes: 5a2414bc454e ("virtio: Intel IFC VF driver for VDPA")
Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Xie Yongji <xieyongji@...edance.com>
---
 drivers/vdpa/ifcvf/ifcvf_main.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
index 21b78f1cd521..351c6cfb24c3 100644
--- a/drivers/vdpa/ifcvf/ifcvf_main.c
+++ b/drivers/vdpa/ifcvf/ifcvf_main.c
@@ -493,9 +493,9 @@ static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 
 	adapter = vdpa_alloc_device(struct ifcvf_adapter, vdpa,
 				    dev, &ifc_vdpa_ops, NULL);
-	if (adapter == NULL) {
+	if (IS_ERR(adapter)) {
 		IFCVF_ERR(pdev, "Failed to allocate vDPA structure");
-		return -ENOMEM;
+		return PTR_ERR(adapter);
 	}
 
 	pci_set_master(pdev);
-- 
2.11.0