drm/amdgpu: fix error checking in amdgpu_read_mm_registers for soc15

From Alex Deucher
39190482e5d0993f237d6a2b54f5548d92156d50 in linux-6.1.y/6.1.20
0dcdf8498eae2727bb33cef3576991dc841d4343 in mainline linux

diff --git a/sys/dev/pci/drm/amd/amdgpu/soc15.c b/sys/dev/pci/drm/amd/amdgpu/soc15.c
index 3c1ad8a..266f1ab 100644 (file)
--- a/sys/dev/pci/drm/amd/amdgpu/soc15.c
+++ b/sys/dev/pci/drm/amd/amdgpu/soc15.c
@@ -439,8 +439,9 @@ static int soc15_read_register(struct amdgpu_device *adev, u32 se_num,
        *value = 0;
        for (i = 0; i < ARRAY_SIZE(soc15_allowed_read_registers); i++) {
                en = &soc15_allowed_read_registers[i];
-               if (adev->reg_offset[en->hwip][en->inst] &&
-                       reg_offset != (adev->reg_offset[en->hwip][en->inst][en->seg]
+               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;