Commit a860eebe authored by Srinivas Pandruvada's avatar Srinivas Pandruvada Committed by Yingbao Jia
Browse files

platform/x86: ISST: Fix usage counter 

mainline inclusion
from mainline-v6.5-rc1
commit b77b75fc
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I8WOEO

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b77b75fc61216cfaa974a8241186635eabe6671a



-------------------------------------

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().

Intel-SIG: commit b77b75fc platform/x86: ISST: Fix usage counter.
Backport Intel speed select ISST driver support on TPMI.

Signed-off-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://lore.kernel.org/r/20230612224033.2382527-3-srinivas.pandruvada@linux.intel.com


Reviewed-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
[ Yingbao Jia: amend commit log ]
Signed-off-by: default avatarYingbao Jia <yingbao.jia@intel.com>
parent 3a26bca3

drivers/platform/x86/intel_speed_select_if/isst_tpmi_core.c

+2 −0
Original line number Diff line number Diff line
@@ -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;