On Sun, Sep 13, 2015 at 06:17:26PM +0530, Chandra Gorentla wrote:
> Hi,
>
> At this point I do not have the hardware.
>
> NULL pointer deference is observed in the wilc1000.ko module on x86 target
> with bus type SPI and when SPI is not ready. Following are the steps to
> reproduce.
>
> $ sudo insmod drivers/staging/wilc1000/wilc1000.ko
> $ sudo ifconfig wlan1 up
>
> wlan1 in the above command is the device controlled by 'wilc1000.ko'.
>
> Though the target I tested is not built to support WILC1000, my test
> scenario can be treated as a case where in SPI is not working or WILC1000
> is not connected to the supported hardware.
>
> I think I know a fix (pasted below) to this but cannot test it because hardware
> is not available to test positive cases.
>
> Thanks,
> chandra
>
> gcs@gcs-HP-Compaq-nx6320:~/linux/staging$ git diff
> diff --git a/drivers/staging/wilc1000/linux_wlan.c b/drivers/staging/wilc1000/linux_wlan.c
> index 63f44f8..48f063d 100644
> --- a/drivers/staging/wilc1000/linux_wlan.c
> +++ b/drivers/staging/wilc1000/linux_wlan.c
> @@ -1634,6 +1634,12 @@ int mac_open(struct net_device *ndev)
> int i = 0;
> struct WILC_WFI_priv *priv;
>
> +#ifdef WILC_SPI
> + if (!g_linux_wlan || !g_linux_wlan->wilc_spidev) {
> + netdev_err(ndev, "wilc1000: SPI device not ready\n");
> + return -ENODEV;
> + }
> +#endif
> nic = netdev_priv(ndev);
> priv = wiphy_priv(nic->wilc_netdev->ieee80211_ptr->wiphy);
> PRINT_D(INIT_DBG, "MAC OPEN[%p]\n", ndev);
> gcs@gcs-HP-Compaq-nx6320:~/linux/staging$
>
Can you resend this in a format that I can apply it?
thanks,
greg k-h
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