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Commit 113a8edf authored by Guenter Roeck's avatar Guenter Roeck Committed by Greg Kroah-Hartman
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net: i825xx: Use absolute_pointer for memcpy from fixed memory location 



[ Upstream commit dff2d13114f0beec448da9b3716204eb34b0cf41 ]

gcc 11.x reports the following compiler warning/error.

  drivers/net/ethernet/i825xx/82596.c: In function 'i82596_probe':
  arch/m68k/include/asm/string.h:72:25: error:
	'__builtin_memcpy' reading 6 bytes from a region of size 0 [-Werror=stringop-overread]

Use absolute_pointer() to work around the problem.

Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
Reviewed-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 2397ea2d

drivers/net/ethernet/i825xx/82596.c

+1 −1
Original line number Diff line number Diff line
@@ -1155,7 +1155,7 @@ struct net_device * __init i82596_probe(int unit) 
			err = -ENODEV;

			goto out;

		}

		memcpy(eth_addr, (void *) 0xfffc1f2c, ETH_ALEN);	/* YUCK! Get addr from NOVRAM */

		memcpy(eth_addr, absolute_pointer(0xfffc1f2c), ETH_ALEN); /* YUCK! Get addr from NOVRAM */

		dev->base_addr = MVME_I596_BASE;

		dev->irq = (unsigned) MVME16x_IRQ_I596;

		goto found;