net/macb: check if macb_config present
The commit 98b5a0f4a228 introduces jumbo frame support, but also it assumes
that macb_config present which is not always true.
The configuration without macb_config fails to boot.
Unable to handle kernel NULL pointer dereference at virtual address 00000010
ptbr = 90350000 pgd = 00000000
Oops: Kernel access of bad area, sig: 11 [#1]
FRAME_POINTER chip: 0x01f:0x1e82 rev 2
Modules linked in:
CPU: 0 PID: 1 Comm: swapper Not tainted 4.2.0-rc3-next-20150723+ #13
task: 91c26000 ti: 91c28000 task.ti: 91c28000
PC is at macb_probe+0x140/0x61c
Fixes: 98b5a0f4a228 (net: macb: Add support for jumbo frames)
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 file changed