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>
---
 drivers/pci/controller/pci-hyperv.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

[+DaveM, netdev]

On Thu, Sep 20, 2018 at 06:40:31AM +0000, Wei Yongjun wrote:
> 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>
> ---
>  drivers/pci/controller/pci-hyperv.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/pci/controller/pci-hyperv.c b/drivers/pci/controller/pci-hyperv.c
> index ee80e79..9ba4d12 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;
> +             }
>       }
>  }
>

FYI

I am dropping this patch from the PCI queue since the original series
is now queued in net-next.

Lorenzo
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[+DaveM, netdev]

Removed erroneously added disclaimer, apologies.

On Thu, Sep 20, 2018 at 06:40:31AM +0000, Wei Yongjun wrote:
> 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>
> ---
>  drivers/pci/controller/pci-hyperv.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/pci/controller/pci-hyperv.c b/drivers/pci/controller/pci-hyperv.c
> index ee80e79..9ba4d12 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;
> +		}
>  	}
>  }

I am dropping this patch from the PCI queue since the original series
is now queued in net-next.

Lorenzo