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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>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
This commit is contained in:
Ioana Ciornei 2023-01-05 17:09:48 +02:00 committed by Tom Rini
parent cfbd388ae7
commit 878a20aa15
1 changed files with 3 additions and 0 deletions
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3
drivers/net/fsl_ls_mdio.c
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@ -124,6 +124,9 @@ static int fsl_ls_mdio_probe(struct udevice *dev)
struct memac_mdio_controller *regs; struct memac_mdio_controller *regs;
priv->regs_base = dev_read_addr_ptr(dev); priv->regs_base = dev_read_addr_ptr(dev);
if (!priv->regs_base)
return -ENODEV;
regs = (struct memac_mdio_controller *)(priv->regs_base); regs = (struct memac_mdio_controller *)(priv->regs_base);
memac_setbits_32(&regs->mdio_stat, memac_setbits_32(&regs->mdio_stat,