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net/mlx4_core: Fix unaligned accesses 

Addresses the following kernel logs seen during boot:

Kernel unaligned access at TPC[100ee150] mlx4_QUERY_HCA+0x80/0x248 [mlx4_core]
Kernel unaligned access at TPC[100f071c] mlx4_QUERY_ADAPTER+0x100/0x12c [mlx4_core]
Kernel unaligned access at TPC[100f071c] mlx4_QUERY_ADAPTER+0x100/0x12c [mlx4_core]
Kernel unaligned access at TPC[100f071c] mlx4_QUERY_ADAPTER+0x100/0x12c [mlx4_core]
Kernel unaligned access at TPC[100f071c] mlx4_QUERY_ADAPTER+0x100/0x12c [mlx4_core]

Signed-off-by: David Ahern <david.ahern@oracle.com>
Acked-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
David Ahern 2015-04-29 16:52:51 -04:00 committed by David S. Miller
parent f94813f3c1
commit 17d5ceb6e4
1 changed files with 14 additions and 4 deletions
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18
drivers/net/ethernet/mellanox/mlx4/fw.c
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@ -56,11 +56,13 @@ MODULE_PARM_DESC(enable_qos, "Enable Enhanced QoS support (default: on)");
#define MLX4_GET(dest, source, offset) \
do { \
void *__p = (char *) (source) + (offset); \
u64 val; \
switch (sizeof (dest)) { \
case 1: (dest) = *(u8 *) __p; break; \
case 2: (dest) = be16_to_cpup(__p); break; \
case 4: (dest) = be32_to_cpup(__p); break; \
case 8: (dest) = be64_to_cpup(__p); break; \
case 8: val = get_unaligned((u64 *)__p); \
(dest) = be64_to_cpu(val); break; \
default: __buggy_use_of_MLX4_GET(); \
} \
} while (0)
@ -1605,9 +1607,17 @@ static void get_board_id(void *vsd, char *board_id)
* swaps each 4-byte word before passing it back to
* us. Therefore we need to swab it before printing.
*/
for (i = 0; i < 4; ++i)
((u32 *) board_id)[i] =
swab32(*(u32 *) (vsd + VSD_OFFSET_MLX_BOARD_ID + i * 4));
u32 *bid_u32 = (u32 *)board_id;
for (i = 0; i < 4; ++i) {
u32 *addr;
u32 val;
addr = (u32 *) (vsd + VSD_OFFSET_MLX_BOARD_ID + i * 4);
val = get_unaligned(addr);
val = swab32(val);
put_unaligned(val, &bid_u32[i]);
}
}
}