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From: Matan Azrad <matan@nvidia.com>
To: Michael Baum <michaelba@nvidia.com>, "dev@dpdk.org" <dev@dpdk.org>
CC: Raslan Darawsheh <rasland@nvidia.com>, Slava Ovsiienko
<viacheslavo@nvidia.com>, "stable@dpdk.org" <stable@dpdk.org>
Thread-Topic: [PATCH 3/4] vdpa/mlx5: fix constant type in QP creation
Thread-Index: AQHXVrVpGsg/56nD70uU3nWt7rxWiasIMB2g
Date: Mon, 7 Jun 2021 07:29:10 +0000
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References: <20210601071122.1612432-1-michaelba@nvidia.com>
<20210601071122.1612432-3-michaelba@nvidia.com>
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Subject: Re: [dpdk-stable] [PATCH 3/4] vdpa/mlx5: fix constant type in QP
creation
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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.
>=20
> 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 differe=
nt value
> than what the function intended it to get.
>=20
> Set the numeric constant 1 to be uint64_t in the first place.
>=20
> Fixes: 8395927cdfaf ("vdpa/mlx5: prepare HW queues")
> Cc: stable@dpdk.org
>=20
> Signed-off-by: Michael Baum <michaelba@nvidia.com>
Acked-by: Matan Azrad <matan@nvidia.com>