PCI: mediatek: Fix unchecked return value

Message ID 20180720150158.GA10922@embeddedor.com
State Accepted
Delegated to: Lorenzo Pieralisi
Headers show
Series
  • PCI: mediatek: Fix unchecked return value
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Commit Message

Gustavo A. R. Silva July 20, 2018, 3:01 p.m.
Check return value of devm_pci_remap_iospace.

Notice that, currently, all instances of devm_pci_remap_iospace
are being checked.

Addresses-Coverity-ID: 1471965 ("Unchecked return value")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
---
 drivers/pci/controller/pcie-mediatek.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Comments

Honghui Zhang Sept. 5, 2018, 8:50 a.m. | #1
On Fri, 2018-07-20 at 10:01 -0500, Gustavo A. R. Silva wrote:
> Check return value of devm_pci_remap_iospace.
> 
> Notice that, currently, all instances of devm_pci_remap_iospace
> are being checked.
> 
> Addresses-Coverity-ID: 1471965 ("Unchecked return value")
> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
> ---
>  drivers/pci/controller/pcie-mediatek.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 

Hi, Gustavo, thanks for your help.

Acked-by: Honghui Zhang <honghui.zhang@mediatek.com>

> diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c
> index 861dda6..1477939 100644
> --- a/drivers/pci/controller/pcie-mediatek.c
> +++ b/drivers/pci/controller/pcie-mediatek.c
> @@ -1109,7 +1109,9 @@ static int mtk_pcie_request_resources(struct mtk_pcie *pcie)
>  	if (err < 0)
>  		return err;
>  
> -	devm_pci_remap_iospace(dev, &pcie->pio, pcie->io.start);
> +	err = devm_pci_remap_iospace(dev, &pcie->pio, pcie->io.start);
> +	if (err)
> +		return err;
>  
>  	return 0;
>  }
Lorenzo Pieralisi Sept. 18, 2018, 10:46 a.m. | #2
On Fri, Jul 20, 2018 at 10:01:58AM -0500, Gustavo A. R. Silva wrote:
> Check return value of devm_pci_remap_iospace.
> 
> Notice that, currently, all instances of devm_pci_remap_iospace
> are being checked.
> 
> Addresses-Coverity-ID: 1471965 ("Unchecked return value")
> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
> ---
>  drivers/pci/controller/pcie-mediatek.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)

Applied to pci/mediatek for v4.20, thanks.

Lorenzo

> diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c
> index 861dda6..1477939 100644
> --- a/drivers/pci/controller/pcie-mediatek.c
> +++ b/drivers/pci/controller/pcie-mediatek.c
> @@ -1109,7 +1109,9 @@ static int mtk_pcie_request_resources(struct mtk_pcie *pcie)
>  	if (err < 0)
>  		return err;
>  
> -	devm_pci_remap_iospace(dev, &pcie->pio, pcie->io.start);
> +	err = devm_pci_remap_iospace(dev, &pcie->pio, pcie->io.start);
> +	if (err)
> +		return err;
>  
>  	return 0;
>  }
> -- 
> 2.7.4
>

Patch

diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c
index 861dda6..1477939 100644
--- a/drivers/pci/controller/pcie-mediatek.c
+++ b/drivers/pci/controller/pcie-mediatek.c
@@ -1109,7 +1109,9 @@  static int mtk_pcie_request_resources(struct mtk_pcie *pcie)
 	if (err < 0)
 		return err;
 
-	devm_pci_remap_iospace(dev, &pcie->pio, pcie->io.start);
+	err = devm_pci_remap_iospace(dev, &pcie->pio, pcie->io.start);
+	if (err)
+		return err;
 
 	return 0;
 }