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net: ethernet: mtk_eth_soc: fix PPE hanging issue
[ Upstream commitea80e3ed09
] 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. Link:b40da332df
Fixes:ba37b7caf1
("net: ethernet: mtk_eth_soc: add support for initializing the PPE") Suggested-by: Bc-bocun Chen <bc-bocun.chen@mediatek.com> Signed-off-by: Daniel Golle <daniel@makrotopia.org> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>
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parent
6b62bad2da
commit
f788073628
1 changed files with 11 additions and 7 deletions
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@ -811,7 +811,7 @@ void mtk_ppe_start(struct mtk_ppe *ppe)
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MTK_PPE_KEEPALIVE_DISABLE) |
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FIELD_PREP(MTK_PPE_TB_CFG_HASH_MODE, 1) |
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FIELD_PREP(MTK_PPE_TB_CFG_SCAN_MODE,
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MTK_PPE_SCAN_MODE_KEEPALIVE_AGE) |
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MTK_PPE_SCAN_MODE_CHECK_AGE) |
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FIELD_PREP(MTK_PPE_TB_CFG_ENTRY_NUM,
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MTK_PPE_ENTRIES_SHIFT);
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if (MTK_HAS_CAPS(ppe->eth->soc->caps, MTK_NETSYS_V2))
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@ -895,17 +895,21 @@ int mtk_ppe_stop(struct mtk_ppe *ppe)
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mtk_ppe_cache_enable(ppe, false);
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/* disable offload engine */
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ppe_clear(ppe, MTK_PPE_GLO_CFG, MTK_PPE_GLO_CFG_EN);
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ppe_w32(ppe, MTK_PPE_FLOW_CFG, 0);
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/* disable aging */
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val = MTK_PPE_TB_CFG_AGE_NON_L4 |
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MTK_PPE_TB_CFG_AGE_UNBIND |
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MTK_PPE_TB_CFG_AGE_TCP |
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MTK_PPE_TB_CFG_AGE_UDP |
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MTK_PPE_TB_CFG_AGE_TCP_FIN;
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MTK_PPE_TB_CFG_AGE_TCP_FIN |
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MTK_PPE_TB_CFG_SCAN_MODE;
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ppe_clear(ppe, MTK_PPE_TB_CFG, val);
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return mtk_ppe_wait_busy(ppe);
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if (mtk_ppe_wait_busy(ppe))
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return -ETIMEDOUT;
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/* disable offload engine */
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ppe_clear(ppe, MTK_PPE_GLO_CFG, MTK_PPE_GLO_CFG_EN);
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ppe_w32(ppe, MTK_PPE_FLOW_CFG, 0);
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return 0;
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}
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