[PATCH 6.9 374/374] platform/x86/intel-uncore-freq: Dont present root domain on error

Greg Kroah-Hartman
2024-06-06T14:11:30Z

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

commit db643cb7ebe524d17b4b13583dda03485d4a1bc0 upstream.

If none of the clusters are added because of some error, fail to load
driver without presenting root domain. In this case root domain will
present invalid data.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Fixes: 01c10f88c9b7 ("platform/x86/intel-uncore-freq: tpmi: Provide cluster level control")
Cc: <stable@vger.kernel.org> # 6.5+
Link: https://lore.kernel.org/r/20240415215210.2824868-1-srinivas.pandruvada@linux.intel.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/platform/x86/intel/uncore-frequency/uncore-frequency-tpmi.c | 7 +++++++
1 file changed, 7 insertions(+)

--- a/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-tpmi.c
+++ b/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-tpmi.c
@@ -240,6 +240,7 @@ static int uncore_probe(struct auxiliary
bool read_blocked = 0, write_blocked = 0;
struct intel_tpmi_plat_info *plat_info;
struct tpmi_uncore_struct *tpmi_uncore;
+ bool uncore_sysfs_added = false;
int ret, i, pkg = 0;
int num_resources;

@@ -384,9 +385,15 @@ static int uncore_probe(struct auxiliary
}
/* Point to next cluster offset */
cluster_offset >>= UNCORE_MAX_CLUSTER_PER_DOMAIN;
+ uncore_sysfs_added = true;
}
}

+ if (!uncore_sysfs_added) {
+ ret = -ENODEV;
+ goto remove_clusters;
+ }
+
auxiliary_set_drvdata(auxdev, tpmi_uncore);

tpmi_uncore->root_cluster.root_domain = true;