From: Arnd Bergmann arnd@arndb.de
commit 40507e7aada8422c38aafa0c8a1a09e4623c712a upstream.
After recent cleanups, gcc started warning about a suspicious memcpy() call during the s2io_io_resume() function:
In function '__dev_addr_set', inlined from 'eth_hw_addr_set' at include/linux/etherdevice.h:318:2, inlined from 's2io_set_mac_addr' at drivers/net/ethernet/neterion/s2io.c:5205:2, inlined from 's2io_io_resume' at drivers/net/ethernet/neterion/s2io.c:8569:7: arch/x86/include/asm/string_32.h:182:25: error: '__builtin_memcpy' accessing 6 bytes at offsets 0 and 2 overlaps 4 bytes at offset 2 [-Werror=restrict] 182 | #define memcpy(t, f, n) __builtin_memcpy(t, f, n) | ^~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/netdevice.h:4648:9: note: in expansion of macro 'memcpy' 4648 | memcpy(dev->dev_addr, addr, len); | ^~~~~~
What apparently happened is that an old cleanup changed the calling conventions for s2io_set_mac_addr() from taking an ethernet address as a character array to taking a struct sockaddr, but one of the callers was not changed at the same time.
Change it to instead call the low-level do_s2io_prog_unicast() function that still takes the old argument type.
Fixes: 2fd376884558 ("S2io: Added support set_mac_address driver entry point") Signed-off-by: Arnd Bergmann arnd@arndb.de Link: https://lore.kernel.org/r/20211013143613.2049096-1-arnd@kernel.org Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/neterion/s2io.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/ethernet/neterion/s2io.c +++ b/drivers/net/ethernet/neterion/s2io.c @@ -8566,7 +8566,7 @@ static void s2io_io_resume(struct pci_de return; }
- if (s2io_set_mac_addr(netdev, netdev->dev_addr) == FAILURE) { + if (do_s2io_prog_unicast(netdev, netdev->dev_addr) == FAILURE) { s2io_card_down(sp); pr_err("Can't restore mac addr after reset.\n"); return;