[PATCH] drm/amdgpu: fix some uninitialized variables
Alex Deucher
alexdeucher at gmail.com
Wed Apr 24 02:33:24 UTC 2024
On Tue, Apr 23, 2024 at 10:04 PM Zhang, Jesse(Jie) <Jesse.Zhang at amd.com> wrote:
>
> [AMD Official Use Only - General]
>
> Hi Alex,
>
> -----Original Message-----
> From: Alex Deucher <alexdeucher at gmail.com>
> Sent: Wednesday, April 24, 2024 9:46 AM
> To: Zhang, Jesse(Jie) <Jesse.Zhang at amd.com>
> Cc: amd-gfx at lists.freedesktop.org; Deucher, Alexander <Alexander.Deucher at amd.com>; Koenig, Christian <Christian.Koenig at amd.com>; Huang, Tim <Tim.Huang at amd.com>
> Subject: Re: [PATCH] drm/amdgpu: fix some uninitialized variables
>
> On Tue, Apr 23, 2024 at 9:27 PM Jesse Zhang <jesse.zhang at amd.com> wrote:
> >
> > Fix some variables not initialized before use.
> > Scan them out using Synopsys tools.
> >
> > Signed-off-by: Jesse Zhang <Jesse.Zhang at amd.com>
> > ---
> > drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c | 2 +-
> > drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c | 5 +++++
> > drivers/gpu/drm/amd/amdgpu/atom.c | 1 +
> > drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c | 3 ++-
> > drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c | 3 ++-
> > drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c | 3 ++-
>
> Please split out the SDMA changes into a separate patch.
>
> More comments below on the other hunks.
>
> > 6 files changed, 13 insertions(+), 4 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
> > b/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
> > index 59acf424a078..60d97cd14855 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
> > @@ -742,7 +742,7 @@ int amdgpu_vce_ring_parse_cs(struct amdgpu_cs_parser *p,
> > uint32_t destroyed = 0;
> > uint32_t created = 0;
> > uint32_t allocated = 0;
> > - uint32_t tmp, handle = 0;
> > + uint32_t tmp = 0, handle = 0;
>
> Can you elaborate on what the issue is here? Presumably it's warning about size being passed as a parameter in the function?
> [Zhang, Jesse(Jie)] Using uninitialized value *size when calling amdgpu_vce_cs_reloc for case 0x03000001. Because uint32_t *size = &tmp;
> I'm not sure if other commands initialize the size before running case 0x03000001.
Yeah, I don't really see a cleaner way to handle this. Maybe Leo has
a better idea?
Alex
>
> > uint32_t *size = &tmp;
> > unsigned int idx;
> > int i, r = 0;
> > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c
> > b/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c
> > index 677eb141554e..13125ddd5e86 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c
> > @@ -410,6 +410,11 @@ static void amdgpu_vcn_idle_work_handler(struct work_struct *work)
> > else
> > new_state.fw_based =
> > VCN_DPG_STATE__UNPAUSE;
> >
> > + if (amdgpu_fence_count_emitted(adev->jpeg.inst->ring_dec))
> > + new_state.jpeg = VCN_DPG_STATE__PAUSE;
> > + else
> > + new_state.jpeg =
> > + VCN_DPG_STATE__UNPAUSE;
> > +
> > adev->vcn.pause_dpg_mode(adev, j, &new_state);
> > }
> >
>
> This should be a separate patch as well.
> Thanks for your reminder, Alex, I will.
>
>
> > diff --git a/drivers/gpu/drm/amd/amdgpu/atom.c
> > b/drivers/gpu/drm/amd/amdgpu/atom.c
> > index 72362df352f6..d552e013354c 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/atom.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/atom.c
> > @@ -1243,6 +1243,7 @@ static int amdgpu_atom_execute_table_locked(struct atom_context *ctx, int index,
> > ectx.ps_size = params_size;
> > ectx.abort = false;
> > ectx.last_jump = 0;
> > + ectx.last_jump_jiffies = 0;
> > if (ws) {
> > ectx.ws = kcalloc(4, ws, GFP_KERNEL);
> > ectx.ws_size = ws;
> > diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c
> > b/drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c
> > index 45a2d0a5a2d7..b7d33d78bce0 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c
> > @@ -999,7 +999,8 @@ static int sdma_v5_0_ring_test_ring(struct amdgpu_ring *ring)
> > r = amdgpu_ring_alloc(ring, 20);
> > if (r) {
> > DRM_ERROR("amdgpu: dma failed to lock ring %d (%d).\n", ring->idx, r);
> > - amdgpu_device_wb_free(adev, index);
> > + if (!ring->is_mes_queue)
> > + amdgpu_device_wb_free(adev, index);
> > return r;
> > }
> >
> > diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c
> > b/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c
> > index 43e64b2da575..cc9e961f0078 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c
> > @@ -839,7 +839,8 @@ static int sdma_v5_2_ring_test_ring(struct amdgpu_ring *ring)
> > r = amdgpu_ring_alloc(ring, 20);
> > if (r) {
> > DRM_ERROR("amdgpu: dma failed to lock ring %d (%d).\n", ring->idx, r);
> > - amdgpu_device_wb_free(adev, index);
> > + if (!ring->is_mes_queue)
> > + amdgpu_device_wb_free(adev, index);
> > return r;
> > }
> >
> > diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c
> > b/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c
> > index 1f4877195213..c833b6b8373b 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c
> > @@ -861,7 +861,8 @@ static int sdma_v6_0_ring_test_ring(struct amdgpu_ring *ring)
> > r = amdgpu_ring_alloc(ring, 5);
> > if (r) {
> > DRM_ERROR("amdgpu: dma failed to lock ring %d (%d).\n", ring->idx, r);
> > - amdgpu_device_wb_free(adev, index);
> > + if (!ring->is_mes_queue)
> > + amdgpu_device_wb_free(adev, index);
> > return r;
> > }
> >
> > --
> > 2.25.1
> >
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