PCI: xilinx: Fix return value in case of error

In function 'xilinx_pcie_init_irq_domain', the pattern used to check and
return error is:

   if (!var) {
      dev_err(...);
      return PTR_ERR(var);
   }

So the returned value in case of error is always 0, which means 'success'.
Change it to return -ENODEV instead.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
 drivers/pci/host/pcie-xilinx.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

On Thu, 2016-07-14 at 12:10:46 +0200, Christophe JAILLET wrote:
> In function 'xilinx_pcie_init_irq_domain', the pattern used to check and
> return error is:
> 
>    if (!var) {
>       dev_err(...);
>       return PTR_ERR(var);
>    }
> 
> So the returned value in case of error is always 0, which means 'success'.
> Change it to return -ENODEV instead.
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Sören Brinkmann <soren.brinkmann@xilinx.com>

	Sören
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On Thu, Jul 14, 2016 at 12:10:46PM +0200, Christophe JAILLET wrote:
> In function 'xilinx_pcie_init_irq_domain', the pattern used to check and
> return error is:
> 
>    if (!var) {
>       dev_err(...);
>       return PTR_ERR(var);
>    }
> 
> So the returned value in case of error is always 0, which means 'success'.
> Change it to return -ENODEV instead.
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>

Applied with Sören's ack to pci/host-xilinx for v4.8, thanks!

> ---
>  drivers/pci/host/pcie-xilinx.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/pci/host/pcie-xilinx.c b/drivers/pci/host/pcie-xilinx.c
> index 4703aa3..a30e016 100644
> --- a/drivers/pci/host/pcie-xilinx.c
> +++ b/drivers/pci/host/pcie-xilinx.c
> @@ -550,7 +550,7 @@ static int xilinx_pcie_init_irq_domain(struct xilinx_pcie_port *port)
>  	pcie_intc_node = of_get_next_child(node, NULL);
>  	if (!pcie_intc_node) {
>  		dev_err(dev, "No PCIe Intc node found\n");
> -		return PTR_ERR(pcie_intc_node);
> +		return -ENODEV;
>  	}
>  
>  	port->irq_domain = irq_domain_add_linear(pcie_intc_node, 4,
> @@ -558,7 +558,7 @@ static int xilinx_pcie_init_irq_domain(struct xilinx_pcie_port *port)
>  						 port);
>  	if (!port->irq_domain) {
>  		dev_err(dev, "Failed to get a INTx IRQ domain\n");
> -		return PTR_ERR(port->irq_domain);
> +		return -ENODEV;
>  	}
>  
>  	/* Setup MSI */
> @@ -569,7 +569,7 @@ static int xilinx_pcie_init_irq_domain(struct xilinx_pcie_port *port)
>  							 &xilinx_pcie_msi_chip);
>  		if (!port->irq_domain) {
>  			dev_err(dev, "Failed to get a MSI IRQ domain\n");
> -			return PTR_ERR(port->irq_domain);
> +			return -ENODEV;
>  		}
>  
>  		xilinx_pcie_enable_msi(port);
> -- 
> 2.7.4
> 
> 
> ---
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> 
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