platform/x86: ISST: Fix usage counter

On multi package system, the TPMI SST instance is getting allocated
again as the usage counter is not getting incremented. Here the
instance is allocated only when the usage count is zero. There is
no need to allocate again.

Increment usage ID on successful return from isst_if_cdev_register().

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://lore.kernel.org/r/20230612224033.2382527-3-srinivas.pandruvada@linux.intel.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

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 664d2ee60385a3eb52752699466f36b0578600f1..63faa2ea8327b2c7d64857ad47ddd31c43d022cd 100644 (file)
--- a/drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c
+++ b/drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c
@@ -1414,6 +1414,8 @@ int tpmi_sst_init(void)
        ret = isst_if_cdev_register(ISST_IF_DEV_TPMI, &cb);
        if (ret)
                kfree(isst_common.sst_inst);
+       else
+               ++isst_core_usage_count;
 init_done:
        mutex_unlock(&isst_tpmi_dev_lock);
        return ret;