drm/amdgpu/mes: add missing locking in helper functions

JIRA: https://issues.redhat.com/browse/RHEL-75958

commit a5b91370f1f7bcdf46c5f224f1ac24494fbfebbc
Author: Alex Deucher <alexander.deucher@amd.com>
Date:   Mon May 19 15:46:25 2025 -0400

    drm/amdgpu/mes: add missing locking in helper functions

    [ Upstream commit 40f970b ]

    We need to take the MES lock.

    Reviewed-by: Michael Chen <michael.chen@amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
    Cc: stable@vger.kernel.org
    Signed-off-by: Sasha Levin <sashal@kernel.org>

Signed-off-by: José Expósito <jexposit@redhat.com>

Author: jexposit

drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c

@@ -836,7 +836,9 @@ int amdgpu_mes_map_legacy_queue(struct amdgpu_device *adev,
 	queue_input.mqd_addr = amdgpu_bo_gpu_offset(ring->mqd_obj);
 	queue_input.wptr_addr = ring->wptr_gpu_addr;
 
+	amdgpu_mes_lock(&adev->mes);
 	r = adev->mes.funcs->map_legacy_queue(&adev->mes, &queue_input);
+	amdgpu_mes_unlock(&adev->mes);
 	if (r)
 		DRM_ERROR("failed to map legacy queue\n");
 
@@ -859,7 +861,9 @@ int amdgpu_mes_unmap_legacy_queue(struct amdgpu_device *adev,
 	queue_input.trail_fence_addr = gpu_addr;
 	queue_input.trail_fence_data = seq;
 
+	amdgpu_mes_lock(&adev->mes);
 	r = adev->mes.funcs->unmap_legacy_queue(&adev->mes, &queue_input);
+	amdgpu_mes_unlock(&adev->mes);
 	if (r)
 		DRM_ERROR("failed to unmap legacy queue\n");
 
@@ -886,7 +890,9 @@ int amdgpu_mes_reset_legacy_queue(struct amdgpu_device *adev,
 	queue_input.vmid = vmid;
 	queue_input.use_mmio = use_mmio;
 
+	amdgpu_mes_lock(&adev->mes);
 	r = adev->mes.funcs->reset_legacy_queue(&adev->mes, &queue_input);
+	amdgpu_mes_unlock(&adev->mes);
 	if (r)
 		DRM_ERROR("failed to reset legacy queue\n");
 
@@ -916,7 +922,9 @@ uint32_t amdgpu_mes_rreg(struct amdgpu_device *adev, uint32_t reg)
 		goto error;
 	}
 
+	amdgpu_mes_lock(&adev->mes);
 	r = adev->mes.funcs->misc_op(&adev->mes, &op_input);
+	amdgpu_mes_unlock(&adev->mes);
 	if (r)
 		DRM_ERROR("failed to read reg (0x%x)\n", reg);
 	else
@@ -944,7 +952,9 @@ int amdgpu_mes_wreg(struct amdgpu_device *adev,
 		goto error;
 	}
 
+	amdgpu_mes_lock(&adev->mes);
 	r = adev->mes.funcs->misc_op(&adev->mes, &op_input);
+	amdgpu_mes_unlock(&adev->mes);
 	if (r)
 		DRM_ERROR("failed to write reg (0x%x)\n", reg);
 
@@ -971,7 +981,9 @@ int amdgpu_mes_reg_write_reg_wait(struct amdgpu_device *adev,
 		goto error;
 	}
 
+	amdgpu_mes_lock(&adev->mes);
 	r = adev->mes.funcs->misc_op(&adev->mes, &op_input);
+	amdgpu_mes_unlock(&adev->mes);
 	if (r)
 		DRM_ERROR("failed to reg_write_reg_wait\n");
 
@@ -996,7 +1008,9 @@ int amdgpu_mes_reg_wait(struct amdgpu_device *adev, uint32_t reg,
 		goto error;
 	}
 
+	amdgpu_mes_lock(&adev->mes);
 	r = adev->mes.funcs->misc_op(&adev->mes, &op_input);
+	amdgpu_mes_unlock(&adev->mes);
 	if (r)
 		DRM_ERROR("failed to reg_write_reg_wait\n");
 
@@ -1687,7 +1701,9 @@ static int amdgpu_mes_set_enforce_isolation(struct amdgpu_device *adev,
 		goto error;
 	}
 
+	amdgpu_mes_lock(&adev->mes);
 	r = adev->mes.funcs->misc_op(&adev->mes, &op_input);
+	amdgpu_mes_unlock(&adev->mes);
 	if (r)
 		dev_err(adev->dev, "failed to change_config.\n");