linux-kernel - [PATCH] HSI: Fix PM usage counter unbalance in ssi_hw

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Message-ID: <20201123101827.3863792-1-zhangqilong3@huawei.com>
Date:   Mon, 23 Nov 2020 18:18:27 +0800
From:   Zhang Qilong <zhangqilong3@...wei.com>
To:     <sre@...nel.org>
CC:     <gustavoars@...nel.org>, <carlos.chinea@...ia.com>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH] HSI: Fix PM usage counter unbalance in ssi_hw_init

pm_runtime_get_sync will increment pm usage counter
even it failed. Forgetting to putting operation will
result in reference leak here. We fix it by replacing
it with pm_runtime_resume_and_get to keep usage counter
balanced.

Fixes: b209e047bc743 ("HSI: Introduce OMAP SSI driver")
Signed-off-by: Zhang Qilong <zhangqilong3@...wei.com>
---
 drivers/hsi/controllers/omap_ssi_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hsi/controllers/omap_ssi_core.c b/drivers/hsi/controllers/omap_ssi_core.c
index fa69b94debd9..b4ac2f8cb9f9 100644
--- a/drivers/hsi/controllers/omap_ssi_core.c
+++ b/drivers/hsi/controllers/omap_ssi_core.c
@@ -424,7 +424,7 @@ static int ssi_hw_init(struct hsi_controller *ssi)
 	struct omap_ssi_controller *omap_ssi = hsi_controller_drvdata(ssi);
 	int err;
 
-	err = pm_runtime_get_sync(ssi->device.parent);
+	err = pm_runtime_resume_and_get(ssi->device.parent);
 	if (err < 0) {
 		dev_err(&ssi->device, "runtime PM failed %d\n", err);
 		return err;
-- 
2.25.4