release 6.14.1
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@@ -1,56 +0,0 @@
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From 69907adec3041a6a89d192441a61481d80ee5806 Mon Sep 17 00:00:00 2001
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From: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
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Date: Wed, 12 Feb 2025 16:33:54 +0800
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Subject: EDAC/igen6: Fix the flood of invalid error reports
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The ECC_ERROR_LOG register of certain SoCs may contain the invalid value
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~0, which results in a flood of invalid error reports in polling mode.
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Fix the flood of invalid error reports by skipping the invalid ECC error
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log value ~0.
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Fixes: e14232afa944 ("EDAC/igen6: Add polling support")
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Reported-by: Ramses <ramses@well-founded.dev>
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Closes: https://lore.kernel.org/all/OISL8Rv--F-9@well-founded.dev/
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Tested-by: Ramses <ramses@well-founded.dev>
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Reported-by: John <therealgraysky@proton.me>
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Closes: https://lore.kernel.org/all/p5YcxOE6M3Ncxpn2-Ia_wCt61EM4LwIiN3LroQvT_-G2jMrFDSOW5k2A9D8UUzD2toGpQBN1eI0sL5dSKnkO8iteZegLoQEj-DwQaMhGx4A=@proton.me/
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Tested-by: John <therealgraysky@proton.me>
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Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
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Signed-off-by: Tony Luck <tony.luck@intel.com>
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Link: https://lore.kernel.org/r/20250212083354.31919-1-qiuxu.zhuo@intel.com
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---
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drivers/edac/igen6_edac.c | 21 +++++++++++++++------
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1 file changed, 15 insertions(+), 6 deletions(-)
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--- a/drivers/edac/igen6_edac.c
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+++ b/drivers/edac/igen6_edac.c
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@@ -785,13 +785,22 @@ static u64 ecclog_read_and_clear(struct
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{
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u64 ecclog = readq(imc->window + ECC_ERROR_LOG_OFFSET);
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- if (ecclog & (ECC_ERROR_LOG_CE | ECC_ERROR_LOG_UE)) {
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- /* Clear CE/UE bits by writing 1s */
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- writeq(ecclog, imc->window + ECC_ERROR_LOG_OFFSET);
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- return ecclog;
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- }
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+ /*
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+ * Quirk: The ECC_ERROR_LOG register of certain SoCs may contain
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+ * the invalid value ~0. This will result in a flood of invalid
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+ * error reports in polling mode. Skip it.
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+ */
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+ if (ecclog == ~0)
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+ return 0;
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- return 0;
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+ /* Neither a CE nor a UE. Skip it.*/
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+ if (!(ecclog & (ECC_ERROR_LOG_CE | ECC_ERROR_LOG_UE)))
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+ return 0;
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+
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+ /* Clear CE/UE bits by writing 1s */
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+ writeq(ecclog, imc->window + ECC_ERROR_LOG_OFFSET);
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+
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+ return ecclog;
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}
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static void errsts_clear(struct igen6_imc *imc)
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