Re: [PATCH 3/4] vDPA/ifcvf: Fix return value check for vdpa_alloc_device()

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On Thu, Jul 15, 2021 at 04:00:25PM +0800, Xie Yongji wrote:
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@xxxxxxxxxx>
Signed-off-by: Xie Yongji <xieyongji@xxxxxxxxxxxxx>
---
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


Reviewed-by: Stefano Garzarella <sgarzare@xxxxxxxxxx>

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