linux-kernel - [PATCH 5.14 209/432] media: atomisp: Fix runtime PM imbalance in atomisp_pci

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Message-Id: <20210916155817.917342318@linuxfoundation.org>
Date:   Thu, 16 Sep 2021 17:59:18 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dinghao Liu <dinghao.liu@....edu.cn>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.14 209/432] media: atomisp: Fix runtime PM imbalance in atomisp_pci_probe

From: Dinghao Liu <dinghao.liu@....edu.cn>

[ Upstream commit 672fe1cf145ab9978c62eb827d6a16aa6b63994b ]

When hmm_pool_register() fails, a pairing PM usage counter
increment is needed to keep the counter balanced. It's the
same for the following error paths.

Link: https://lore.kernel.org/linux-media/20210408081850.24278-1-dinghao.liu@zju.edu.cn
Signed-off-by: Dinghao Liu <dinghao.liu@....edu.cn>
Acked-by: Andy Shevchenko <andy.shevchenko@...il.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/staging/media/atomisp/pci/atomisp_v4l2.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/staging/media/atomisp/pci/atomisp_v4l2.c b/drivers/staging/media/atomisp/pci/atomisp_v4l2.c
index 948769ca6539..af0d83eaa68c 100644
--- a/drivers/staging/media/atomisp/pci/atomisp_v4l2.c
+++ b/drivers/staging/media/atomisp/pci/atomisp_v4l2.c
@@ -1815,6 +1815,7 @@ static int atomisp_pci_probe(struct pci_dev *pdev, const struct pci_device_id *i
 	hmm_cleanup();
 	hmm_pool_unregister(HMM_POOL_TYPE_RESERVED);
 hmm_pool_fail:
+	pm_runtime_get_noresume(&pdev->dev);
 	destroy_workqueue(isp->wdt_work_queue);
 wdt_work_queue_fail:
 	atomisp_acc_cleanup(isp);
-- 
2.30.2