[PATCH] net: ravb: Fix NULL pointer access

Some phy's like rtl8211e do not support writeext() callback. Add a check to avoid null pointer access before calling writeext() callback.

Signed-off-by: Biju Das biju.das.jz@bp.renesas.com Reviewed-by: Lad Prabhakar prabhakar.mahadev-lad.rj@bp.renesas.com --- drivers/net/ravb.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ravb.c b/drivers/net/ravb.c index 886f53ee82..623d377897 100644 --- a/drivers/net/ravb.c +++ b/drivers/net/ravb.c @@ -438,7 +438,8 @@ static int ravb_config(struct udevice *dev)

writel(mask, eth->iobase + RAVB_REG_ECMR);

- phy->drv->writeext(phy, -1, 0x02, 0x08, (0x0f << 5) | 0x19); + if (phy->drv->writeext) + phy->drv->writeext(phy, -1, 0x02, 0x08, (0x0f << 5) | 0x19);

return 0; }