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From:   Ryan McCann <quic_rmccann@quicinc.com>
Date:   Thu, 22 Jun 2023 16:48:53 -0700
Subject: [PATCH 1/6] drm/msm: Update dev core dump to not print backwards
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Message-ID: <20230622-devcoredump_patch-v1-1-3b2cdcc6a576@quicinc.com>
References: <20230622-devcoredump_patch-v1-0-3b2cdcc6a576@quicinc.com>
In-Reply-To: <20230622-devcoredump_patch-v1-0-3b2cdcc6a576@quicinc.com>
To:     Rob Clark <robdclark@gmail.com>,
        Abhinav Kumar <quic_abhinavk@quicinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
        Sean Paul <sean@poorly.run>,
        Marijn Suijten <marijn.suijten@somainline.org>,
        David Airlie <airlied@gmail.com>,
        Daniel Vetter <daniel@ffwll.ch>
CC:     Rob Clark <robdclark@chromium.org>,
        <linux-arm-msm@vger.kernel.org>, <dri-devel@lists.freedesktop.org>,
        <freedreno@lists.freedesktop.org>, <linux-kernel@vger.kernel.org>,
        <quic_jesszhan@quicinc.com>, Ryan McCann <quic_rmccann@quicinc.com>
Precedence: bulk

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")
Signed-off-by: Ryan McCann <quic_rmccann@quicinc.com>
---
 drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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 acfe1b31e079..add72bbc28b1 100644
--- a/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c
+++ b/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c
@@ -192,5 +192,5 @@ 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);
 }

-- 
2.25.1