[PATCH v2 6/7] alx: fix MAC address alignment problem
From: Johannes Berg <johannes@sipsolutions.net>
Date: 2013-06-25 18:38:30
Subsystem:
atlx ethernet drivers, networking drivers, the rest · Maintainers:
Chris Snook, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
In two places, parts of MAC addresses are used as u32/u16 values. This can cause alignment problems, use put_unaligned and get_unaligned to fix this. Reported-by: Ben Hutchings <redacted> Signed-off-by: Johannes Berg <johannes@sipsolutions.net> --- drivers/net/ethernet/atheros/alx/hw.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/atheros/alx/hw.c b/drivers/net/ethernet/atheros/alx/hw.c
index 2a2bbe9..6b34855 100644
--- a/drivers/net/ethernet/atheros/alx/hw.c
+++ b/drivers/net/ethernet/atheros/alx/hw.c@@ -282,8 +282,8 @@ static bool alx_read_macaddr(struct alx_hw *hw, u8 *addr) mac1 = alx_read_mem32(hw, ALX_STAD1); /* addr should be big-endian */ - *(__be32 *)(addr + 2) = cpu_to_be32(mac0); - *(__be16 *)addr = cpu_to_be16(mac1); + put_unaligned(cpu_to_be32(mac0), (__be32 *)(addr + 2)); + put_unaligned(cpu_to_be16(mac1), (__be16 *)addr); return is_valid_ether_addr(addr); }
@@ -326,9 +326,9 @@ void alx_set_macaddr(struct alx_hw *hw, const u8 *addr) u32 val; /* for example: 00-0B-6A-F6-00-DC * STAD0=6AF600DC, STAD1=000B */ - val = be32_to_cpu(*(__be32 *)(addr + 2)); + val = be32_to_cpu(get_unaligned((__be32 *)(addr + 2))); alx_write_mem32(hw, ALX_STAD0, val); - val = be16_to_cpu(*(__be16 *)addr); + val = be16_to_cpu(get_unaligned((__be16 *)addr)); alx_write_mem32(hw, ALX_STAD1, val); }
--
1.8.0