From: Shiwu Zhang Date: Thu, 20 Jul 2023 07:25:15 +0000 (+0800) Subject: drm/amdgpu: fix the indexing issue during rlcg access ctrl init X-Git-Tag: v6.6-rc1~1^2~20^2~42 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=9bc12db4e2f62fe257ce02a8d4aa20e9c47fbe0e;p=linux-block.git drm/amdgpu: fix the indexing issue during rlcg access ctrl init In case that the GET_INST() is used for looping, only loops for the times of actual num of xcc, otherwise GET_INST() will return the invalid index, a.k.a -1 And also remove the redundant mask checking in case of GET_INST() Signed-off-by: Shiwu Zhang Reviewed-by: Le Ma Reviewed-by: Lijo Lazar Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c index 9053435488c5..86a84a0970f0 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c @@ -1075,12 +1075,11 @@ static void gfx_v9_4_3_xcc_unset_safe_mode(struct amdgpu_device *adev, static void gfx_v9_4_3_init_rlcg_reg_access_ctrl(struct amdgpu_device *adev) { - int xcc_id; + int xcc_id, num_xcc; struct amdgpu_rlcg_reg_access_ctrl *reg_access_ctrl; - for (xcc_id = 0; xcc_id < AMDGPU_MAX_RLC_INSTANCES; xcc_id++) { - if (((1 << xcc_id) & adev->gfx.xcc_mask) == 0) - continue; + num_xcc = NUM_XCC(adev->gfx.xcc_mask); + for (xcc_id = 0; xcc_id < num_xcc; xcc_id++) { reg_access_ctrl = &adev->gfx.rlc.reg_access_ctrl[GET_INST(GC, xcc_id)]; reg_access_ctrl->scratch_reg0 = SOC15_REG_OFFSET(GC, GET_INST(GC, xcc_id), regSCRATCH_REG0); reg_access_ctrl->scratch_reg1 = SOC15_REG_OFFSET(GC, GET_INST(GC, xcc_id), regSCRATCH_REG1);