mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

r8169: fix incorrect mac address assignment 

The original changes brakes MAC address assignment on older chip
versions (see bug report [0]), and it brakes random MAC assignment.

is_valid_ether_addr() requires that its argument is word-aligned.
Add the missing alignment to array mac_addr.

[0] https://bugzilla.kernel.org/show_bug.cgi?id=215087

Fixes: 1c5d09d587 ("ethernet: r8169: use eth_hw_addr_set()")
Reported-by: Richard Herbert <rherbert@sympatico.ca>
Tested-by: Richard Herbert <rherbert@sympatico.ca>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Heiner Kallweit 2021-11-22 22:35:33 +01:00 committed by David S. Miller
parent 52911bb62e
commit c75a9ad436
1 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/net/ethernet/realtek/r8169_main.c
View File

@ -5217,8 +5217,8 @@ static int rtl_get_ether_clk(struct rtl8169_private *tp)
static void rtl_init_mac_address(struct rtl8169_private *tp)
{
u8 mac_addr[ETH_ALEN] __aligned(2) = {};
struct net_device *dev = tp->dev;
u8 mac_addr[ETH_ALEN];
int rc;
rc = eth_platform_get_mac_address(tp_to_dev(tp), mac_addr);
@ -5233,7 +5233,8 @@ static void rtl_init_mac_address(struct rtl8169_private *tp)
if (is_valid_ether_addr(mac_addr))
goto done;
eth_hw_addr_random(dev);
eth_random_addr(mac_addr);
dev->addr_assign_type = NET_ADDR_RANDOM;
dev_warn(tp_to_dev(tp), "can't read MAC address, setting random one\n");
done:
eth_hw_addr_set(dev, mac_addr);