diff mbox series

[3/4] vdpa/mlx5: fix constant type in QP creation

Message ID 20210601071122.1612432-3-michaelba@nvidia.com (mailing list archive)
State Superseded
Delegated to: Thomas Monjalon
Headers show
Series [1/4] regex/mlx5: fix size of setup constants | expand

Checks

Context Check Description
ci/checkpatch success coding style OK

Commit Message

Michael Baum June 1, 2021, 7:11 a.m. UTC
The mlx5_vdpa_event_qp_create function makes shifting to the numeric
constant 1, then multiplies it by another constant and finally assigns
it into a uint64_t variable.

The numeric constant type is an int with a 32-bit sign. if after
shifting , its MSB (bit of sign) will change, the uint64 variable will
get into it a different value than what the function intended it to get.

Set the numeric constant 1 to be uint64_t in the first place.

Fixes: 8395927cdfaf ("vdpa/mlx5: prepare HW queues")
Cc: stable@dpdk.org

Signed-off-by: Michael Baum <michaelba@nvidia.com>
---
 drivers/vdpa/mlx5/mlx5_vdpa_event.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Matan Azrad June 7, 2021, 7:29 a.m. UTC | #1
From: Michael Baum:
> The mlx5_vdpa_event_qp_create function makes shifting to the numeric
> constant 1, then multiplies it by another constant and finally assigns it into a
> uint64_t variable.
> 
> The numeric constant type is an int with a 32-bit sign. if after shifting , its MSB
> (bit of sign) will change, the uint64 variable will get into it a different value
> than what the function intended it to get.
> 
> Set the numeric constant 1 to be uint64_t in the first place.
> 
> Fixes: 8395927cdfaf ("vdpa/mlx5: prepare HW queues")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Michael Baum <michaelba@nvidia.com>
Acked-by: Matan Azrad <matan@nvidia.com>
diff mbox series

Patch

diff --git a/drivers/vdpa/mlx5/mlx5_vdpa_event.c b/drivers/vdpa/mlx5/mlx5_vdpa_event.c
index 88f6a4256d..3541c652ce 100644
--- a/drivers/vdpa/mlx5/mlx5_vdpa_event.c
+++ b/drivers/vdpa/mlx5/mlx5_vdpa_event.c
@@ -629,8 +629,8 @@  mlx5_vdpa_event_qp_create(struct mlx5_vdpa_priv *priv, uint16_t desc_n,
 	attr.wq_umem_id = eqp->umem_obj->umem_id;
 	attr.wq_umem_offset = 0;
 	attr.dbr_umem_id = eqp->umem_obj->umem_id;
-	attr.dbr_address = (1 << log_desc_n) * MLX5_WSEG_SIZE;
 	attr.ts_format = mlx5_ts_format_conv(priv->qp_ts_format);
+	attr.dbr_address = RTE_BIT64(log_desc_n) * MLX5_WSEG_SIZE;
 	eqp->sw_qp = mlx5_devx_cmd_create_qp(priv->ctx, &attr);
 	if (!eqp->sw_qp) {
 		DRV_LOG(ERR, "Failed to create SW QP(%u).", rte_errno);