Check that network interface is running before changing its MAC address.
Otherwise, rxch is accessed when it's NULL - causing a kernel oops.
Moreover, check that the new MAC address is valid.
Signed-off-by: Pablo Bitton <pablo.bit...@gmail.com>
Signed-off-by: Chaithrika U S <chaithr...@ti.com>
Tested-by: Chaithrika U S <chaithr...@ti.com>
[tested on DM6467 EVM]
---
drivers/net/davinci_emac.c | 12 ++++++++++--
1 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/net/davinci_emac.c b/drivers/net/davinci_emac.c
index cf689a0..dddb2b9 100644
--- a/drivers/net/davinci_emac.c
+++ b/drivers/net/davinci_emac.c
@@ -1821,11 +1821,19 @@ static int emac_dev_setmac_addr(struct net_device
*ndev, void *addr)
struct sockaddr *sa = addr;
DECLARE_MAC_BUF(mac);
+ if (!is_valid_ether_addr(sa->sa_data))
+ return -EINVAL;
+
/* Store mac addr in priv and rx channel and set it in EMAC hw */
memcpy(priv->mac_addr, sa->sa_data, ndev->addr_len);
- memcpy(rxch->mac_addr, sa->sa_data, ndev->addr_len);
memcpy(ndev->dev_addr, sa->sa_data, ndev->addr_len);
- emac_setmac(priv, EMAC_DEF_RX_CH, rxch->mac_addr);
+
+ /* If the interface is down - rxch is NULL. */
+ /* MAC address is configured only after the interface is enabled. */
+ if (netif_running(ndev)) {
+ memcpy(rxch->mac_addr, sa->sa_data, ndev->addr_len);
+ emac_setmac(priv, EMAC_DEF_RX_CH, rxch->mac_addr);
+ }
if (netif_msg_drv(priv))
dev_notice(emac_dev, "DaVinci EMAC: emac_dev_setmac_addr %s\n",
--
1.5.4.3
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