[PATCH] drm/amdgpu: fix structurally dead code vcn_v2_5_hw_init

From: Gustavo A. R. Silva
Date: Tue Oct 01 2019 - 13:17:18 EST


Notice that there is a *continue* statement in the middle of the
for loop and that prevents the code below from ever being reached:

r = amdgpu_ring_test_ring(ring);
if (r) {
ring->sched.ready = false;
goto done;
}

Fix this by removing the continue statement and updating ring->sched.ready
to true before calling amdgpu_ring_test_ring(ring).

Notice that this fix is based on
commit 1b61de45dfaf ("drm/amdgpu: add initial VCN2.0 support (v2)")

Addresses-Coverity-ID 1485608 ("Structurally dead code")
Fixes: 28c17d72072b ("drm/amdgpu: add VCN2.5 basic supports")
Signed-off-by: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx>
---

Any feedback is greatly appreciated.

drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c b/drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c
index 395c2259f979..47b0dcd59e13 100644
--- a/drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c
+++ b/drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c
@@ -258,6 +258,7 @@ static int vcn_v2_5_hw_init(void *handle)
adev->nbio_funcs->vcn_doorbell_range(adev, ring->use_doorbell,
ring->doorbell_index, j);

+ ring->sched.ready = true;
r = amdgpu_ring_test_ring(ring);
if (r) {
ring->sched.ready = false;
@@ -266,8 +267,7 @@ static int vcn_v2_5_hw_init(void *handle)

for (i = 0; i < adev->vcn.num_enc_rings; ++i) {
ring = &adev->vcn.inst[j].ring_enc[i];
- ring->sched.ready = false;
- continue;
+ ring->sched.ready = true;
r = amdgpu_ring_test_ring(ring);
if (r) {
ring->sched.ready = false;
@@ -276,6 +276,7 @@ static int vcn_v2_5_hw_init(void *handle)
}

ring = &adev->vcn.inst[j].ring_jpeg;
+ ring->sched.ready = true;
r = amdgpu_ring_test_ring(ring);
if (r) {
ring->sched.ready = false;
--
2.23.0