b43: N-PHY: add overriding RF control for rev7+

[Dan Carpenter <dan.carpenter@oracle.com>]

On Thu, Aug 09, 2012 at 05:15:39PM +0300, Dan Carpenter wrote:
> Hello Rafa? Mi?ecki,
> 
> This is a semi-automatic email about new static checker warnings.
> 
> The patch c071b9f666be: "b43: N-PHY: add overriding RF control for 
> rev7+" from Jul 26, 2012, leads to the following Smatch complaint:
> 
> drivers/net/wireless/b43/phy_n.c:158 b43_nphy_rf_control_override_rev7()
> 	 warn: variable dereferenced before check 'e' (see line 154)
> 
> drivers/net/wireless/b43/phy_n.c
>    153	
>    154			val_addr = (i == 0) ? e->val_addr_core0 : e->val_addr_core1;
>                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> New dereferences.
> 
>    155	
>    156			if (off) {
>    157				b43_phy_mask(dev, en_addr, ~en_mask);
>    158				if (e) /* Do it safer, better than wl */
>                                    ^^^
> New check.
> 
>    159					b43_phy_mask(dev, val_addr, ~e->val_mask);
>    160			} else {
> 

There is a second NULL check a couple lines down as well.

regards,
dan carpenter