On Tuesday 01 January 2013 22:11:01 Alexey Khoroshilov wrote:
> If pci_set_dma_mask() or pci_set_consistent_dma_mask() fails in p54p_probe(),
> it breaks off initialization, deallocates all resources, but returns zero.
>
> The patch implements proper error code propagation.
Uh, Thanks!
But wait, I think there's another return 0 in the error
path. See p54pci.c @ line 558:
mem_len = pci_resource_len(pdev, 0);
if (mem_len < sizeof(...)) {
dev_err(...)
goto err_disabled_dev;
}
Do you think you can add a err = -EINVAL; before the goto too?
[I wonder why this wasn't found by the verification project as
well? Could it be that pci_resource_len(...) < sizeof(...) is
somehow always true and this is a dead branch?]
> Found by Linux Driver Verification project (linuxtesting.org).
>
> Signed-off-by: Alexey Khoroshilov <khoroshi...@ispras.ru>
Acked-by: Christian Lamparter <chunk...@googlemail.com>
Regards,
Christian
> ---
> drivers/net/wireless/p54/p54pci.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/wireless/p54/p54pci.c
> b/drivers/net/wireless/p54/p54pci.c
> index 933e5d9..fef69ea 100644
> --- a/drivers/net/wireless/p54/p54pci.c
> +++ b/drivers/net/wireless/p54/p54pci.c
> @@ -568,8 +568,10 @@ static int p54p_probe(struct pci_dev *pdev,
> goto err_disable_dev;
> }
>
> - if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) ||
> - pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32))) {
> + err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
> + if (!err)
> + err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
> + if (err) {
> dev_err(&pdev->dev, "No suitable DMA available\n");
> goto err_free_reg;
> }
>
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