From: Lijo Lazar <lijo.lazar@amd.com>
Date: Sat, 18 Apr 2026 00:51:17 +0000 (+0530)
Subject: drm/amd/pm: Check SMUv13.0.6/12 metrics integrity
X-Git-Tag: v7.2-rc1~141^2~24^2~139
X-Git-Url: http://git.ipfire.org/gitweb/index.cgi?a=commitdiff_plain;h=6fc63d80c01a480e3d2c98620f07d46e5bcfc85a;p=thirdparty%2Flinux.git

drm/amd/pm: Check SMUv13.0.6/12 metrics integrity

Check if data fetch is proper by matching the first few bytes against
0xFFs. If 0xFFs, that means data couldn't be read properly.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Asad Kamal <asad.kamal@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c
index cd0a23f432ff8..36716541e505e 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c
@@ -783,6 +783,10 @@ int smu_v13_0_6_get_metrics_table(struct smu_context *smu, void *metrics_table,
 		if (ret)
 			return ret;
 
+		if (!memchr_inv(smu_table->metrics_table, 0xff,
+				min(16, table_size)))
+			return -EHWPOISON;
+
 		smu_table->metrics_time = jiffies;
 	}