drm/msm: Update dev core dump to not print backwards

[ Upstream commit 903705111d863ed8ccf73465da77d232fc422ec1 ]

Device core dump add block method adds hardware blocks to dumping queue
with stack behavior which causes the hardware blocks to be printed in
reverse order. Change the addition to dumping queue data structure
from "list_add" to "list_add_tail" for FIFO queue behavior.

Fixes: 98659487b845 ("drm/msm: add support to take dpu snapshot")
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Signed-off-by: Ryan McCann <quic_rmccann@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/546200/
Link: https://lore.kernel.org/r/20230622-devcoredump_patch-v5-1-67e8b66c4723@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c b/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c
index 369e57f73a470725c3b53a964a808eec661c66c5..8746ceae8fca90cb3efbf2bb7ffed09dfcefc350 100644 (file)
--- a/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c
+++ b/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c
@@ -185,5 +185,5 @@ void msm_disp_snapshot_add_block(struct msm_disp_state *disp_state, u32 len,
        new_blk->base_addr = base_addr;
 
        msm_disp_state_dump_regs(&new_blk->state, new_blk->size, base_addr);
-       list_add(&new_blk->node, &disp_state->blocks);
+       list_add_tail(&new_blk->node, &disp_state->blocks);
 }