[PATCH 4.18 127/150] net/mlx5: Take only bit 24-26 of wqe.pftype_wq for page fault type

From: Greg Kroah-Hartman
Date: Fri Nov 02 2018 - 14:44:59 EST


4.18-stable review patch. If anyone has any objections, please let me know.

------------------

From: Huy Nguyen <huyn@xxxxxxxxxxxx>

[ Upstream commit a48bc513159d4767f9988f0d857b2b0c38a4d614 ]

The HW spec defines only bits 24-26 of pftype_wq as the page fault type,
use the required mask to ensure that.

Fixes: d9aaed838765 ("{net,IB}/mlx5: Refactor page fault handling")
Signed-off-by: Huy Nguyen <huyn@xxxxxxxxxxxx>
Signed-off-by: Eli Cohen <eli@xxxxxxxxxxxx>
Signed-off-by: Saeed Mahameed <saeedm@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/mellanox/mlx5/core/eq.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ethernet/mellanox/mlx5/core/eq.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eq.c
@@ -269,7 +269,7 @@ static void eq_pf_process(struct mlx5_eq
case MLX5_PFAULT_SUBTYPE_WQE:
/* WQE based event */
pfault->type =
- be32_to_cpu(pf_eqe->wqe.pftype_wq) >> 24;
+ (be32_to_cpu(pf_eqe->wqe.pftype_wq) >> 24) & 0x7;
pfault->token =
be32_to_cpu(pf_eqe->wqe.token);
pfault->wqe.wq_num =