[PATCH 6.19 29/86] platform/x86: ISST: Reset core count to 0

Greg Kroah-Hartman
2026-04-13T16:06:09Z

From: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>

commit e1415b9418eb22b4a7a1ef4b4aec9dd0a49e3fa7 upstream.

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
Link: https://patch.msgid.link/20260325192638.3417281-1-srinivas.pandruvada@linux.intel.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c | 2 ++
1 file changed, 2 insertions(+)

--- a/drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c
+++ b/drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c
@@ -1460,6 +1460,8 @@ static int isst_if_get_turbo_freq_info(v
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;