[PATCH] platform/x86: ISST: Reset core count to 0

[PATCH] platform/x86: ISST: Reset core count to 0

[Srinivas Pandruvada]

Based on feature revision, number of buckets can be less than the
TRL_MAX_BUCKETS. In that case core counts in the remaining buckets
can be set to some invalid values.

Hence reset core count to 0 for all buckets before assigning correct
values.

Fixes: 885d1c2a30b7 ("platform/x86: ISST: Support SST-TF revision 2")
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc: stable@vger.kernel.org
---
 drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c b/drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c
index b8cdaa233ea9..dc22504aea32 100644
--- a/drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c
+++ b/drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c
@@ -1458,6 +1458,8 @@ static int isst_if_get_turbo_freq_info(void __user *argp)
 					    SST_MUL_FACTOR_FREQ)
 	}
 
+	memset(turbo_freq.bucket_core_counts, 0, sizeof(turbo_freq.bucket_core_counts));
+
 	if (feature_rev >= 2) {
 		bool has_tf_info_8 = false;
 
-- 
2.52.0

Re: [PATCH] platform/x86: ISST: Reset core count to 0

[Ilpo Järvinen]

On Wed, 25 Mar 2026 12:26:38 -0700, Srinivas Pandruvada wrote:

> Based on feature revision, number of buckets can be less than the
> TRL_MAX_BUCKETS. In that case core counts in the remaining buckets
> can be set to some invalid values.
> 
> Hence reset core count to 0 for all buckets before assigning correct
> values.
> 
> [...]


Thank you for your contribution, it has been applied to my local
review-ilpo-fixes branch. Note it will show up in the public
platform-drivers-x86/review-ilpo-fixes branch only once I've pushed my
local branch there, which might take a while.

The list of commits applied:
[1/1] platform/x86: ISST: Reset core count to 0
      commit: e1415b9418eb22b4a7a1ef4b4aec9dd0a49e3fa7

--
 i.