linux-kernel - Re: [PATCH] drm/amdgpu/powerplay/psm: Fix memory leak in power state init

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Date:   Tue, 18 Oct 2022 11:59:09 -0400
From:   Alex Deucher <alexdeucher@...il.com>
To:     "Quan, Evan" <Evan.Quan@....com>
Cc:     Rafael Mendonca <rafaelmendsr@...il.com>,
        "Deucher, Alexander" <Alexander.Deucher@....com>,
        "Koenig, Christian" <Christian.Koenig@....com>,
        "Pan, Xinhui" <Xinhui.Pan@....com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "amd-gfx@...ts.freedesktop.org" <amd-gfx@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/amdgpu/powerplay/psm: Fix memory leak in power state init

Applied.  Thanks!

Alex

On Mon, Oct 17, 2022 at 9:07 PM Quan, Evan <Evan.Quan@....com> wrote:
>
> [AMD Official Use Only - General]
>
> Reviewed-by: Evan Quan <evan.quan@....com>
>
> > -----Original Message-----
> > From: Rafael Mendonca <rafaelmendsr@...il.com>
> > Sent: Tuesday, October 18, 2022 8:54 AM
> > To: Quan, Evan <Evan.Quan@....com>; Deucher, Alexander
> > <Alexander.Deucher@....com>; Koenig, Christian
> > <Christian.Koenig@....com>; Pan, Xinhui <Xinhui.Pan@....com>; David
> > Airlie <airlied@...il.com>; Daniel Vetter <daniel@...ll.ch>
> > Cc: Rafael Mendonca <rafaelmendsr@...il.com>; amd-
> > gfx@...ts.freedesktop.org; dri-devel@...ts.freedesktop.org; linux-
> > kernel@...r.kernel.org
> > Subject: [PATCH] drm/amdgpu/powerplay/psm: Fix memory leak in power
> > state init
> >
> > Commit 902bc65de0b3 ("drm/amdgpu/powerplay/psm: return an error in
> > power state init") made the power state init function return early in case of
> > failure to get an entry from the powerplay table, but it missed to clean up the
> > allocated memory for the current power state before returning.
> >
> > Fixes: 902bc65de0b3 ("drm/amdgpu/powerplay/psm: return an error in
> > power state init")
> > Signed-off-by: Rafael Mendonca <rafaelmendsr@...il.com>
> > ---
> >  drivers/gpu/drm/amd/pm/powerplay/hwmgr/pp_psm.c | 2 ++
> >  1 file changed, 2 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/pp_psm.c
> > b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/pp_psm.c
> > index 67d7da0b6fed..1d829402cd2e 100644
> > --- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/pp_psm.c
> > +++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/pp_psm.c
> > @@ -75,8 +75,10 @@ int psm_init_power_state_table(struct pp_hwmgr
> > *hwmgr)
> >       for (i = 0; i < table_entries; i++) {
> >               result = hwmgr->hwmgr_func->get_pp_table_entry(hwmgr,
> > i, state);
> >               if (result) {
> > +                     kfree(hwmgr->current_ps);
> >                       kfree(hwmgr->request_ps);
> >                       kfree(hwmgr->ps);
> > +                     hwmgr->current_ps = NULL;
> >                       hwmgr->request_ps = NULL;
> >                       hwmgr->ps = NULL;
> >                       return -EINVAL;
> > --
> > 2.34.1