[PATCH] drivers: net: fsl_ls_mdio: prevent a NULL pointer dereference

Prevent a NULL pointer dereference in the probe path by checking the return valud of dev_read_addr_ptr() against NULL.

Signed-off-by: Ioana Ciornei ioana.ciornei@nxp.com --- drivers/net/fsl_ls_mdio.c | 3 +++ 1 file changed, 3 insertions(+)

diff --git a/drivers/net/fsl_ls_mdio.c b/drivers/net/fsl_ls_mdio.c index f213e0dd8590..fce73937502d 100644 --- a/drivers/net/fsl_ls_mdio.c +++ b/drivers/net/fsl_ls_mdio.c @@ -124,6 +124,9 @@ static int fsl_ls_mdio_probe(struct udevice *dev) struct memac_mdio_controller *regs;

priv->regs_base = dev_read_addr_ptr(dev); + if (!priv->regs_base) + return -ENODEV; + regs = (struct memac_mdio_controller *)(priv->regs_base);

memac_setbits_32(&regs->mdio_stat,