Patch "IB/mlx5: Add support for 400G_8X lane speed" has been added to the 5.15-stable tree

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This is a note to let you know that I've just added the patch titled

    IB/mlx5: Add support for 400G_8X lane speed

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     ib-mlx5-add-support-for-400g_8x-lane-speed.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit d7f5dac1bbcf39662a933402d88f66414bc7d7c6
Author: Maher Sanalla <msanalla@xxxxxxxxxx>
Date:   Thu Mar 16 15:40:49 2023 +0200

    IB/mlx5: Add support for 400G_8X lane speed
    
    [ Upstream commit 88c9483faf15ada14eca82714114656893063458 ]
    
    Currently, when driver queries PTYS to report which link speed is being
    used on its RoCE ports, it does not check the case of having 400Gbps
    transmitted over 8 lanes. Thus it fails to report the said speed and
    instead it defaults to report 10G over 4 lanes.
    
    Add a check for the said speed when querying PTYS and report it back
    correctly when needed.
    
    Fixes: 08e8676f1607 ("IB/mlx5: Add support for 50Gbps per lane link modes")
    Signed-off-by: Maher Sanalla <msanalla@xxxxxxxxxx>
    Reviewed-by: Aya Levin <ayal@xxxxxxxxxx>
    Reviewed-by: Saeed Mahameed <saeedm@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/ec9040548d119d22557d6a4b4070d6f421701fd4.1678973994.git.leon@xxxxxxxxxx
    Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 827ee3040bea2..2361caa385471 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -443,6 +443,10 @@ static int translate_eth_ext_proto_oper(u32 eth_proto_oper, u16 *active_speed,
 		*active_width = IB_WIDTH_2X;
 		*active_speed = IB_SPEED_NDR;
 		break;
+	case MLX5E_PROT_MASK(MLX5E_400GAUI_8):
+		*active_width = IB_WIDTH_8X;
+		*active_speed = IB_SPEED_HDR;
+		break;
 	case MLX5E_PROT_MASK(MLX5E_400GAUI_4_400GBASE_CR4_KR4):
 		*active_width = IB_WIDTH_4X;
 		*active_speed = IB_SPEED_NDR;



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