linux-kernel - [PATCH v2] mips: cm: reprime error cause

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Message-Id: <20190206114424.24206-1-vladimir.kondratiev@linux.intel.com>
Date:   Wed,  6 Feb 2019 13:44:24 +0200
From:   Vladimir Kondratiev <vladimir.kondratiev@...ux.intel.com>
To:     Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paul.burton@...s.com>,
        James Hogan <jhogan@...nel.org>
Cc:     linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        Vladimir Kondratiev <vladimir.kondratiev@...x.intel.com>,
        Vladimir Kondratiev <vladimir.kondratiev@...ux.intel.com>
Subject: [PATCH v2] mips: cm: reprime error cause

From: Vladimir Kondratiev <vladimir.kondratiev@...x.intel.com>

Accordingly to the documentation
---cut---
The GCR_ERROR_CAUSE.ERR_TYPE field and the GCR_ERROR_MULT.ERR_TYPE
fields can be cleared by either a reset or by writing the current
value of GCR_ERROR_CAUSE.ERR_TYPE to the
GCR_ERROR_CAUSE.ERR_TYPE register.
---cut---
Do exactly this. Original value of cm_error may be safely written back;
it clears error cause and keeps other bits untouched.

Fixes: 3885c2b463f6 ("MIPS: CM: Add support for reporting CM cache errors")
Signed-off-by: Vladimir Kondratiev <vladimir.kondratiev@...ux.intel.com>
---
 arch/mips/kernel/mips-cm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/mips/kernel/mips-cm.c b/arch/mips/kernel/mips-cm.c
index 8f5bd04f320a..7f3f136572de 100644
--- a/arch/mips/kernel/mips-cm.c
+++ b/arch/mips/kernel/mips-cm.c
@@ -457,5 +457,5 @@ void mips_cm_error_report(void)
 	}
 
 	/* reprime cause register */
-	write_gcr_error_cause(0);
+	write_gcr_error_cause(cm_error);
 }
-- 
2.19.1