PCI: hv: Fix return value check in hv_pci_assign_slots()

In case of error, the function pci_create_slot() returns ERR_PTR() and
never returns NULL. The NULL test in the return value check should be
replaced with IS_ERR().

Fixes: a15f2c08c708 ("PCI: hv: support reporting serial number as slot information")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/pci/controller/pci-hyperv.c b/drivers/pci/controller/pci-hyperv.c
index ee80e79db21a..9ba4d12c179c 100644
--- a/drivers/pci/controller/pci-hyperv.c
+++ b/drivers/pci/controller/pci-hyperv.c
@@ -1484,8 +1484,10 @@ static void hv_pci_assign_slots(struct hv_pcibus_device *hbus)
                 snprintf(name, SLOT_NAME_SIZE, "%u", hpdev->desc.ser);
                 hpdev->pci_slot = pci_create_slot(hbus->pci_bus, slot_nr,
                                           name, NULL);
-                if (!hpdev->pci_slot)
+                if (IS_ERR(hpdev->pci_slot)) {
                         pr_warn("pci_create slot %s failed\n", name);
+                        hpdev->pci_slot = NULL;
+                }
         }
 }