linux-kernel - [PATCH] media: atomisp: Fix runtime PM imbalance in atomisp_pci

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Message-Id: <20210408081850.24278-1-dinghao.liu@zju.edu.cn>
Date:   Thu,  8 Apr 2021 16:18:43 +0800
From:   Dinghao Liu <dinghao.liu@....edu.cn>
To:     dinghao.liu@....edu.cn, kjlu@....edu
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        linux-media@...r.kernel.org, linux-staging@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: [PATCH] media: atomisp: Fix runtime PM imbalance in atomisp_pci_probe

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.

Signed-off-by: Dinghao Liu <dinghao.liu@....edu.cn>
---
 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 0295e2e32d79..02f774ed80c8 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);
-- 
2.17.1