+++ /dev/null
-From c8262ebbf7ca546dd5ead3c0383a89eb401627ff Mon Sep 17 00:00:00 2001
-From: Daniel Golle <daniel@makrotopia.org>
-Date: Wed, 13 Mar 2024 17:55:02 +0000
-Subject: [PATCH] net: ethernet: mtk_eth_soc: fix PPE hanging issue
-
-A patch to resolve an issue was found in MediaTek's GPL-licensed SDK:
-In the mtk_ppe_stop() function, the PPE scan mode is not disabled before
-disabling the PPE. This can potentially lead to a hang during the process
-of disabling the PPE.
-
-Without this patch, the PPE may experience a hang during the reboot test.
-
-Reference: https://git01.mediatek.com/plugins/gitiles/openwrt/feeds/mtk-openwrt-feeds/+/b40da332dfe763932a82f9f62a4709457a15dd6c
-
-Suggested-by: Bc-bocun Chen <bc-bocun.chen@mediatek.com>
-Signed-off-by: Daniel Golle <daniel@makrotopia.org>
----
- drivers/net/ethernet/mediatek/mtk_ppe.c | 18 +++++++++++-------
- 1 file changed, 11 insertions(+), 7 deletions(-)
-
---- a/drivers/net/ethernet/mediatek/mtk_ppe.c
-+++ b/drivers/net/ethernet/mediatek/mtk_ppe.c
-@@ -1008,7 +1008,7 @@ void mtk_ppe_start(struct mtk_ppe *ppe)
- MTK_PPE_KEEPALIVE_DISABLE) |
- FIELD_PREP(MTK_PPE_TB_CFG_HASH_MODE, 1) |
- FIELD_PREP(MTK_PPE_TB_CFG_SCAN_MODE,
-- MTK_PPE_SCAN_MODE_KEEPALIVE_AGE) |
-+ MTK_PPE_SCAN_MODE_CHECK_AGE) |
- FIELD_PREP(MTK_PPE_TB_CFG_ENTRY_NUM,
- MTK_PPE_ENTRIES_SHIFT);
- if (mtk_is_netsys_v2_or_greater(ppe->eth))
-@@ -1104,17 +1104,21 @@ int mtk_ppe_stop(struct mtk_ppe *ppe)
-
- mtk_ppe_cache_enable(ppe, false);
-
-- /* disable offload engine */
-- ppe_clear(ppe, MTK_PPE_GLO_CFG, MTK_PPE_GLO_CFG_EN);
-- ppe_w32(ppe, MTK_PPE_FLOW_CFG, 0);
--
- /* disable aging */
- val = MTK_PPE_TB_CFG_AGE_NON_L4 |
- MTK_PPE_TB_CFG_AGE_UNBIND |
- MTK_PPE_TB_CFG_AGE_TCP |
- MTK_PPE_TB_CFG_AGE_UDP |
-- MTK_PPE_TB_CFG_AGE_TCP_FIN;
-+ MTK_PPE_TB_CFG_AGE_TCP_FIN |
-+ MTK_PPE_TB_CFG_SCAN_MODE;
- ppe_clear(ppe, MTK_PPE_TB_CFG, val);
-
-- return mtk_ppe_wait_busy(ppe);
-+ if (mtk_ppe_wait_busy(ppe))
-+ return -ETIMEDOUT;
-+
-+ /* disable offload engine */
-+ ppe_clear(ppe, MTK_PPE_GLO_CFG, MTK_PPE_GLO_CFG_EN);
-+ ppe_w32(ppe, MTK_PPE_FLOW_CFG, 0);
-+
-+ return 0;
- }