[PATCH 9/9] drm/amdgpu: Adjust the sequence to query ras error info

[Alex Deucher]

From: Hawking Zhang <Hawking.Zhang at amd.com>

It turns out STATUS_VALID_FLAG needs to be checked
ahead of any other fields. ADDRESS_VALID_FLAG and
ERR_INFO_VALID_FLAG only manages ADDRESS and ERR_INFO
field respectively. driver should continue poll
ERR CNT field even ERR_INFO_VALD_FLAG is not set.

Signed-off-by: Hawking Zhang <Hawking.Zhang at amd.com>
Reviewed-by: Tao Zhou <tao.zhou1 at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
index 5ae89602a116..64f80e8cbd63 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -3164,7 +3164,8 @@ bool amdgpu_ras_inst_get_err_cnt_field(struct amdgpu_device *adev,
 
 	if ((reg_entry->flags & AMDGPU_RAS_ERR_INFO_VALID) &&
 	    !REG_GET_FIELD(err_status_hi_data, ERR_STATUS_HI, ERR_INFO_VALID_FLAG))
-		return false;
+		/* keep the check here in case we need to refer to the result later */
+		dev_dbg(adev->dev, "Invalid err_info field\n");
 
 	/* read err count */
 	*err_cnt = REG_GET_FIELD(err_status_hi_data, ERR_STATUS, ERR_CNT);
@@ -3187,17 +3188,17 @@ void amdgpu_ras_inst_query_ras_error_count(struct amdgpu_device *adev,
 	uint32_t i, j;
 
 	for (i = 0; i < reg_list_size; i++) {
+		/* query memory_id from err_status_lo */
+		if (!amdgpu_ras_inst_get_memory_id_field(adev, &reg_list[i],
+							 instance, &memory_id))
+			continue;
+
 		/* query err_cnt from err_status_hi */
 		if (!amdgpu_ras_inst_get_err_cnt_field(adev, &reg_list[i],
 						       instance, &err_cnt) ||
 		    !err_cnt)
 			continue;
 
-		/* query memory_id from err_status_lo */
-		if (!amdgpu_ras_inst_get_memory_id_field(adev, &reg_list[i],
-							 instance, &memory_id))
-			continue;
-
 		*err_count += err_cnt;
 
 		/* log the errors */
-- 
2.40.1