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| author | David Ahern <david.ahern@oracle.com> | 2015-04-29 22:52:51 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-04-30 22:26:30 +0200 |
| commit | 17d5ceb6e43ea545d6d92db2f3ddb035233ba335 (patch) | |
| tree | a9ba6e6173cc539a0168c3f1bbced7b7676e5db2 /drivers/net | |
| parent | mlx4_en: Use correct loop cursor in error path. (diff) | |
| download | linux-17d5ceb6e43ea545d6d92db2f3ddb035233ba335.tar.xz linux-17d5ceb6e43ea545d6d92db2f3ddb035233ba335.zip | |
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>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/fw.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/fw.c b/drivers/net/ethernet/mellanox/mlx4/fw.c index a4079811b176..e30bf57ad7a1 100644 --- a/drivers/net/ethernet/mellanox/mlx4/fw.c +++ b/drivers/net/ethernet/mellanox/mlx4/fw.c @@ -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]); + } } } |