Properly skip non-existent registers as well.

Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/2442
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/soc21.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/soc21.c 
b/drivers/gpu/drm/amd/amdgpu/soc21.c
index 620f7409825d..9df2236007ab 100644
--- a/drivers/gpu/drm/amd/amdgpu/soc21.c
+++ b/drivers/gpu/drm/amd/amdgpu/soc21.c
@@ -291,9 +291,10 @@ static int soc21_read_register(struct amdgpu_device *adev, 
u32 se_num,
        *value = 0;
        for (i = 0; i < ARRAY_SIZE(soc21_allowed_read_registers); i++) {
                en = &soc21_allowed_read_registers[i];
-               if (adev->reg_offset[en->hwip][en->inst] &&
-                   reg_offset != (adev->reg_offset[en->hwip][en->inst][en->seg]
-                                  + en->reg_offset))
+               if (!adev->reg_offset[en->hwip][en->inst])
+                       continue;
+               else if (reg_offset != 
(adev->reg_offset[en->hwip][en->inst][en->seg]
+                                       + en->reg_offset))
                        continue;
 
                *value = soc21_get_register_value(adev,
-- 
2.39.2

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