linux-kernel - Re: [PATCH] PCI: rcar: fix error handling of irq_of_parse_and

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Date:	Tue, 9 Dec 2014 15:38:46 -0700
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	Dmitry Torokhov <dtor@...omium.org>
Cc:	Simon Horman <horms@...ge.net.au>,
	Phil Edworthy <phil.edworthy@...esas.com>,
	linux-pci@...r.kernel.org, linux-sh@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] PCI: rcar: fix error handling of irq_of_parse_and_map

On Fri, Nov 14, 2014 at 02:21:53PM -0800, Dmitry Torokhov wrote:
> Return value of irq_of_parse_and_map() is unsigned int, with 0
> indicating failure, so testing for negative result never works.
> 
> Signed-off-by: Dmitry Torokhov <dtor@...omium.org>

Applied with Phil's ack to next-pci/host-rcar for v3.19.  This branch will
be rebased to v3.19-rc1.

> ---
> 
> Not tested, found by casual code inspection.
> 
>  drivers/pci/host/pcie-rcar.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/pci/host/pcie-rcar.c b/drivers/pci/host/pcie-rcar.c
> index 9b356c3..6ca976f 100644
> --- a/drivers/pci/host/pcie-rcar.c
> +++ b/drivers/pci/host/pcie-rcar.c
> @@ -764,7 +764,7 @@ static int rcar_pcie_get_resources(struct platform_device *pdev,
>  		goto err_map_reg;
>  
>  	i = irq_of_parse_and_map(pdev->dev.of_node, 0);
> -	if (i < 0) {
> +	if (!i) {
>  		dev_err(pcie->dev, "cannot get platform resources for msi interrupt\n");
>  		err = -ENOENT;
>  		goto err_map_reg;
> @@ -772,7 +772,7 @@ static int rcar_pcie_get_resources(struct platform_device *pdev,
>  	pcie->msi.irq1 = i;
>  
>  	i = irq_of_parse_and_map(pdev->dev.of_node, 1);
> -	if (i < 0) {
> +	if (!i) {
>  		dev_err(pcie->dev, "cannot get platform resources for msi interrupt\n");
>  		err = -ENOENT;
>  		goto err_map_reg;
> -- 
> 2.1.0.rc2.206.gedb03e5
> 
> 
> -- 
> Dmitry
--
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