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drivers: staging: wilc1000: Add check for SPI availability

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NULL pointer deference is observed in the wilc1000.ko module
with bus type SPI and when SPI is not ready.

Signed-off-by: Chandra S Gorentla <csgorentla@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chandra S Gorentla 2015-09-15 18:09:51 +05:30 committed by Greg Kroah-Hartman
parent 8fec2ee4fa
commit 7d05652c5c
1 changed files with 6 additions and 0 deletions
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6
drivers/staging/wilc1000/linux_wlan.c
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@ -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);