linux-kernel - [PATCH 2/2] platform_x86: intel_pmt

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Date:   Tue, 16 Mar 2021 19:44:55 -0700
From:   "David E. Box" <david.e.box@...ux.intel.com>
To:     hdegoede@...hat.com, mgross@...ux.intel.com
Cc:     "David E. Box" <david.e.box@...ux.intel.com>, lee.jones@...aro.org,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] platform_x86: intel_pmt_crashlog: Fix incorrect macros

Fixes off-by-one bugs in the macro assignments for the crashlog control
bits. Was initially tested on emulation but bug revealed after testing on
silicon.

Fixes: 5ef9998c96b0 ("platform/x86: Intel PMT Crashlog capability driver")
Signed-off-by: David E. Box <david.e.box@...ux.intel.com>
---
 drivers/platform/x86/intel_pmt_crashlog.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/platform/x86/intel_pmt_crashlog.c b/drivers/platform/x86/intel_pmt_crashlog.c
index 97dd749c8290..92d315a16cfd 100644
--- a/drivers/platform/x86/intel_pmt_crashlog.c
+++ b/drivers/platform/x86/intel_pmt_crashlog.c
@@ -23,18 +23,17 @@
 #define CRASH_TYPE_OOBMSM	1
 
 /* Control Flags */
-#define CRASHLOG_FLAG_DISABLE		BIT(27)
+#define CRASHLOG_FLAG_DISABLE		BIT(28)
 
 /*
- * Bits 28 and 29 control the state of bit 31.
+ * Bits 29 and 30 control the state of bit 31.
  *
- * Bit 28 will clear bit 31, if set, allowing a new crashlog to be captured.
- * Bit 29 will immediately trigger a crashlog to be generated, setting bit 31.
- * Bit 30 is read-only and reserved as 0.
+ * Bit 29 will clear bit 31, if set, allowing a new crashlog to be captured.
+ * Bit 30 will immediately trigger a crashlog to be generated, setting bit 31.
  * Bit 31 is the read-only status with a 1 indicating log is complete.
  */
-#define CRASHLOG_FLAG_TRIGGER_CLEAR	BIT(28)
-#define CRASHLOG_FLAG_TRIGGER_EXECUTE	BIT(29)
+#define CRASHLOG_FLAG_TRIGGER_CLEAR	BIT(29)
+#define CRASHLOG_FLAG_TRIGGER_EXECUTE	BIT(30)
 #define CRASHLOG_FLAG_TRIGGER_COMPLETE	BIT(31)
 #define CRASHLOG_FLAG_TRIGGER_MASK	GENMASK(31, 28)
 
-- 
2.25.1