drivers: net: wireless: b43: Fix possible NULL ptr dereference

On the ternary expression the 'e' variable could be NULL dereferenced,
when b43_nphy_get_rf_ctl_over_rev7 function returns NULL.

Signed-off-by: Felipe Pena <felipensp@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/net/wireless/b43/phy_n.c b/drivers/net/wireless/b43/phy_n.c
index 7c970d3ae358..05ee7f10cc8f 100644
--- a/drivers/net/wireless/b43/phy_n.c
+++ b/drivers/net/wireless/b43/phy_n.c
@@ -164,7 +164,8 @@ static void b43_nphy_rf_ctl_override_rev7(struct b43_wldev *dev, u16 field,
                 }
                 en_addr = en_addrs[override][i];
 
-                val_addr = (i == 0) ? e->val_addr_core0 : e->val_addr_core1;
+                if (e)
+                        val_addr = (i == 0) ? e->val_addr_core0 : e->val_addr_core1;
 
                 if (off) {
                         b43_phy_mask(dev, en_addr, ~en_mask);