linux-kernel - [PATCH V4 7/9] tools/arch/x86/intel_sdsi: Fix meter

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Message-Id: <20240411025856.2782476-8-david.e.box@linux.intel.com>
Date: Wed, 10 Apr 2024 19:58:54 -0700
From: "David E. Box" <david.e.box@...ux.intel.com>
To: david.e.box@...ux.intel.com,
	hdegoede@...hat.com,
	ilpo.jarvinen@...ux.intel.com,
	platform-driver-x86@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	sathyanarayanan.kuppuswamy@...ux.intel.com
Subject: [PATCH V4 7/9] tools/arch/x86/intel_sdsi: Fix meter_certificate decoding

Fix errors in the calculation of the start position of the counters and in
the display loop. While here, use a #define for the bundle count and size.

Fixes: 7fdc03a7370f ("tools/arch/x86: intel_sdsi: Add support for reading meter certificates")
Signed-off-by: David E. Box <david.e.box@...ux.intel.com>
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>
---
V4 - Use suggested struct bundle_encoding_counter cast

V3 - Use macros for bundle size and count

V2 - Split of V1 patch 7

 tools/arch/x86/intel_sdsi/intel_sdsi.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/tools/arch/x86/intel_sdsi/intel_sdsi.c b/tools/arch/x86/intel_sdsi/intel_sdsi.c
index ae29214da102..ba2a6b6645ae 100644
--- a/tools/arch/x86/intel_sdsi/intel_sdsi.c
+++ b/tools/arch/x86/intel_sdsi/intel_sdsi.c
@@ -394,7 +394,7 @@ static int sdsi_meter_cert_show(struct sdsi_dev *s)
 	printf("MMRC encoding:                %.4s\n", name);
 
 	printf("MMRC counter:                 %d\n", mc->mmrc_counter);
-	if (mc->bundle_length % 8) {
+	if (mc->bundle_length % METER_BUNDLE_SIZE) {
 		fprintf(stderr, "Invalid bundle length\n");
 		return -1;
 	}
@@ -405,15 +405,16 @@ static int sdsi_meter_cert_show(struct sdsi_dev *s)
 		return -1;
 	}
 
-	bec = (void *)(mc) + sizeof(mc);
+	bec = (struct bundle_encoding_counter *)(mc + 1);
 
 	printf("Number of Feature Counters:   %ld\n", BUNDLE_COUNT(mc->bundle_length));
-	while (count++ < mc->bundle_length / 8) {
+	while (count < BUNDLE_COUNT(mc->bundle_length)) {
 		char feature[5];
 
 		feature[4] = '\0';
 		get_feature(bec[count].encoding, feature);
 		printf("    %s:          %d\n", feature, bec[count].counter);
+		++count;
 	}
 
 	return 0;
-- 
2.34.1