[PATCH] net/mlx4_core: Fix unaligned accesses
From: David Ahern <hidden>
Date: 2015-04-29 20:53:03
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 <redacted> --- 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 5a21e5d..a8e5661 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 Quality of Service support in the HCA (defa #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)
@@ -1526,9 +1528,17 @@ 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]); + } } }
--
1.7.1