ethernet: s2io: fix setting mac address during resume
Subsystems (2)
PATCH 1/1 ethernet: s2io: fix setting mac address during resume
From: Arnd Bergmann <[email protected]>
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.
--- drivers/net/ethernet/neterion/s2io.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
drivers/net/ethernet/neterion/s2io.c +1 -1
@@ -8566,7 +8566,7 @@ static void s2io_io_resume(struct pci_dev *pdev)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 ;
Signature · 1 line
2.29.2
This patch was applied to netdev/net.git (master) by Jakub Kicinski <[email protected]>:
Hello:
This patch was applied to netdev/net.git (master)
by Jakub Kicinski <[email protected]>:
Quoted 11 lines · On Wed, 13 Oct 2021 16:35:49 +0200 you wrote:
From: Arnd Bergmann <[email protected]>
After recent cleanups, gcc started warning about a suspicious
memcpy()call during thes2io_io_resume()function:In function '
__dev_addr_set',
inlined from 'eth_hw_addr_set' atinclude/linux/etherdevice.h:318:2,
inlined from 's2io_set_mac_addr' atdrivers/net/ethernet/neterion/s2io.c:5205:2,
inlined from 's2io_io_resume' atdrivers/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 | #definememcpy(t, f, n)__builtin_memcpy(t, f, n)
Quoted 6 lines
| ^~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/netdevice.h:4648:9: note: in expansion of macro 'memcpy' 4648 | memcpy(dev->dev_addr, addr, len); | ^~~~~~[...]
Here is the summary with links:
- ethernet: s2io: fix setting mac address during resume
https://git.kernel.org/netdev/net/c/40507e7aada8
You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html