2018-07-20 15:03:14

by Gustavo A. R. Silva

Subject: [PATCH] PCI: mediatek: Fix unchecked return value

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 <[email protected]>
---
drivers/pci/controller/pcie-mediatek.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

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

2018-09-05 08:52:07

by Honghui Zhang

Subject: Re: [PATCH] PCI: mediatek: Fix unchecked return value

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 <[email protected]>
> ---
> drivers/pci/controller/pcie-mediatek.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>

Hi, Gustavo, thanks for your help.

Acked-by: Honghui Zhang <[email protected]>

> 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;
> }

2018-09-18 10:46:56

by Lorenzo Pieralisi

Subject: Re: [PATCH] PCI: mediatek: Fix unchecked return value

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 <[email protected]>
> ---
> 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
>