[PATCH 22.11] net/mlx5: fix incorrect counter cache dereference

[Ali Alnubani]

> -----Original Message-----
> From: Luca Boccassi <bluca at debian.org>
> Sent: Saturday, April 20, 2024 1:22 AM
> To: Dariusz Sosnowski <dsosnowski at nvidia.com>; Ali Alnubani
> <alialnu at nvidia.com>
> Cc: Matan Azrad <matan at nvidia.com>; Slava Ovsiienko
> <viacheslavo at nvidia.com>; Bing Zhao <bingz at nvidia.com>; Ori Kam
> <orika at nvidia.com>; stable at dpdk.org
> Subject: Re: [PATCH 22.11] net/mlx5: fix incorrect counter cache dereference
> 
> On Fri, 19 Apr 2024 at 14:10, Dariusz Sosnowski <dsosnowski at nvidia.com>
> wrote:
> >
> > When counter pool is prepopulated with preallocated counters,
> > some counters were preloaded to per-queue caches.
> > Per-queue counter cache can be disabled due to a change introduced in
> > commit 244dbbf77871 ("net/mlx5: fix flow counter cache starvation").
> > Aforementioned preload happened even if counter cache was disabled,
> > which caused a segmentation fault on the attempt to access the cache.
> >
> > This patch adds a missing check for counter cache before preloading.
> >
> > Fixes: 244dbbf77871 ("net/mlx5: fix flow counter cache starvation")
> >
> > Signed-off-by: Dariusz Sosnowski <dsosnowski at nvidia.com>
> > Acked-by: Viacheslav Ovsiienko <viacheslavo at nvidia.com>
> > ---
> >  drivers/net/mlx5/mlx5_hws_cnt.c | 38 ++++++++++++++++++---------------
> >  1 file changed, 21 insertions(+), 17 deletions(-)
> 
> Applied and pushed.
> 
> Ali, is this the issue you mentioned on the validation report? If so
> is it all green now after this is included?

Yes, this patch resolves the issue I mentioned in my report.

Thanks,
Ali