> -----Original Message----- > From: amd-gfx [mailto:amd-gfx-bounces at lists.freedesktop.org] On Behalf > Of Kent Russell > Sent: Friday, March 2, 2018 12:39 PM > To: amd-gfx at freedesktop.org > Cc: Russell, Kent <Kent.Russell at amd.com> > Subject: [PATCH] drm/amdgpu: Fail when setting negative DPM levels > > kstrtol can handle negative values, which is unchecked here. While setting a > negative value will result in the mask being 1<<0xffffffff , which the SMU will > ignore because it's out of long bits, return an error instead of silently failing. > > Signed-off-by: Kent Russell <kent.russell at amd.com> Reviewed-by: Alex Deucher <alexander.deucher at amd.com> > --- > drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c > b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c > index 9e73cbc..145ef62 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c > @@ -476,7 +476,7 @@ static ssize_t amdgpu_set_pp_dpm_sclk(struct > device *dev, > sub_str[1] = '\0'; > ret = kstrtol(sub_str, 0, &level); > > - if (ret) { > + if (ret || level < 0) { > count = -EINVAL; > goto fail; > } > @@ -522,7 +522,7 @@ static ssize_t amdgpu_set_pp_dpm_mclk(struct > device *dev, > sub_str[1] = '\0'; > ret = kstrtol(sub_str, 0, &level); > > - if (ret) { > + if (ret || level < 0) { > count = -EINVAL; > goto fail; > } > @@ -567,7 +567,7 @@ static ssize_t amdgpu_set_pp_dpm_pcie(struct > device *dev, > sub_str[1] = '\0'; > ret = kstrtol(sub_str, 0, &level); > > - if (ret) { > + if (ret || level < 0) { > count = -EINVAL; > goto fail; > } > -- > 2.7.4 > > _______________________________________________ > amd-gfx mailing list > amd-gfx at lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/amd-gfx
