Re: [PATCH mlx5-next 1/5] RDMA/mlx5: Replace struct mlx5_core_mkey by u32 key

On Thu, Jul 29, 2021 at 12:28:03PM -0300, Jason Gunthorpe wrote:

On Tue, Jun 22, 2021 at 03:08:19PM +0300, Leon Romanovsky wrote:

quoted

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/mr.c b/drivers/net/ethernet/mellanox/mlx5/core/mr.c
index 50af84e76fb6..7a76b5eb1c1a 100644
+++ b/drivers/net/ethernet/mellanox/mlx5/core/mr.c

@@ -35,13 +35,11 @@
 #include <linux/mlx5/driver.h>
 #include "mlx5_core.h"
 
-int mlx5_core_create_mkey(struct mlx5_core_dev *dev,
-			  struct mlx5_core_mkey *mkey,
-			  u32 *in, int inlen)
+int mlx5_core_create_mkey(struct mlx5_core_dev *dev, u32 *mkey, u32 *in,
+			  int inlen)
 {
 	u32 lout[MLX5_ST_SZ_DW(create_mkey_out)] = {};
 	u32 mkey_index;
-	void *mkc;
 	int err;
 
 	MLX5_SET(create_mkey_in, in, opcode, MLX5_CMD_OP_CREATE_MKEY);

@@ -50,38 +48,32 @@ int mlx5_core_create_mkey(struct mlx5_core_dev *dev,
 	if (err)
 		return err;
 
-	mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry);
 	mkey_index = MLX5_GET(create_mkey_out, lout, mkey_index);
-	mkey->iova = MLX5_GET64(mkc, mkc, start_addr);
-	mkey->size = MLX5_GET64(mkc, mkc, len);
-	mkey->key |= mlx5_idx_to_mkey(mkey_index);
-	mkey->pd = MLX5_GET(mkc, mkc, pd);
-	init_waitqueue_head(&mkey->wait);
+	*mkey |= mlx5_idx_to_mkey(mkey_index);

This conflicts with 0232fc2ddcf4 ("net/mlx5: Reset mkey index on creation")

Please resend/rebase. I think it should be fixed like

	mkey_index = MLX5_GET(create_mkey_out, lout, mkey_index);
	*mkey = (u32)mlx5_mkey_variant(mkey->key) | mlx5_idx_to_mkey(mkey_index);

	mlx5_core_dbg(dev, "out 0x%x, mkey 0x%x\n", mkey_index,	*mkey);
?

Yes, this is how it is fixed in my tree. I just waited till you finish the review.

(though I will look at the rest of the series today, so don't rush on
this)

Jason