linux-kernel - [PATCH 2/2] platform/x86: ISST: Fix usage counter

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Message-Id: <20230612224033.2382527-3-srinivas.pandruvada@linux.intel.com>
Date:   Mon, 12 Jun 2023 15:40:33 -0700
From:   Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
To:     hdegoede@...hat.com, markgross@...nel.org
Cc:     platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
Subject: [PATCH 2/2] 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@...ux.intel.com>
---
 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 664d2ee60385..63faa2ea8327 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
@@ -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;
-- 
2.38.1