Re: [PATCH] staging: mt7621-pci: Fix compiler error 'slot' may be used uninitialized

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Hi René,

On Fri, Jul 5, 2019 at 10:35 PM René van Dorst <opensource@xxxxxxxxxx> wrote:
>
> In commit 802a2f7b2fe3 ("staging: mt7621-pci: factor out
> 'mt7621_pcie_enable_port' function"), slot = port->slot; line was removed.
> Also other dev_err() print parameter was changed from slot to port->slot.
> So the same should be done here.
>
> This also fixes compiler error:
> drivers/staging/mt7621-pci/pci-mt7621.c: In function 'mt7621_pci_probe':
> ./include/linux/device.h:1490:2: warning: 'slot' may be used uninitialized in this function [-Wmaybe-uninitialized]
>   _dev_info(dev, dev_fmt(fmt), ##__VA_ARGS__)
>   ^~~~~~~~~
> drivers/staging/mt7621-pci/pci-mt7621.c:504:6: note: 'slot' was declared here
>   u32 slot;
>       ^~~~
>
> Fixes: 802a2f7b2fe3 ("staging: mt7621-pci: factor out 'mt7621_pcie_enable_port' function")
> Signed-off-by: René van Dorst <opensource@xxxxxxxxxx>
> ---
>  drivers/staging/mt7621-pci/pci-mt7621.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/staging/mt7621-pci/pci-mt7621.c b/drivers/staging/mt7621-pci/pci-mt7621.c
> index 03d919a94552..81600c03cae1 100644
> --- a/drivers/staging/mt7621-pci/pci-mt7621.c
> +++ b/drivers/staging/mt7621-pci/pci-mt7621.c
> @@ -511,7 +511,7 @@ static void mt7621_pcie_enable_ports(struct mt7621_pcie *pcie)
>                                         port->slot);
>                                 continue;
>                         }
> -                       dev_info(dev, "PCIE%d enabled\n", slot);
> +                       dev_info(dev, "PCIE%d enabled\n", port->slot);
>                         num_slots_enabled++;
>                 }
>         }
> --
> 2.20.1
>

I don't know what tree and branch are you using for this but this is
kind of old code... You should
use staging git tree, 'staging-next' branch for staging patches to
avoid problems like this.

Best regards,
    Sergio Paracuellos
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