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From:   Johan Hovold <johan+linaro@kernel.org>
To:     Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
        Johan Hovold <johan+linaro@kernel.org>, stable@vger.kernel.org,
        Roger Quadros <rogerq@ti.com>
Subject: [PATCH 01/11] USB: dwc3: fix runtime pm imbalance on probe errors
Date:   Tue,  4 Apr 2023 09:25:14 +0200
Message-Id: <20230404072524.19014-2-johan+linaro@kernel.org>
In-Reply-To: <20230404072524.19014-1-johan+linaro@kernel.org>
References: <20230404072524.19014-1-johan+linaro@kernel.org>
MIME-Version: 1.0
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Make sure not to suspend the device when probe fails to avoid disabling
clocks and phys multiple times.

Fixes: 328082376aea ("usb: dwc3: fix runtime PM in error path")
Cc: stable@vger.kernel.org      # 4.8
Cc: Roger Quadros <rogerq@ti.com>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
---
 drivers/usb/dwc3/core.c | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 476b63618511..5058bd8d56ca 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -1883,13 +1883,11 @@ static int dwc3_probe(struct platform_device *pdev)
 	spin_lock_init(&dwc->lock);
 	mutex_init(&dwc->mutex);
 
+	pm_runtime_get_noresume(dev);
 	pm_runtime_set_active(dev);
 	pm_runtime_use_autosuspend(dev);
 	pm_runtime_set_autosuspend_delay(dev, DWC3_DEFAULT_AUTOSUSPEND_DELAY);
 	pm_runtime_enable(dev);
-	ret = pm_runtime_get_sync(dev);
-	if (ret < 0)
-		goto err1;
 
 	pm_runtime_forbid(dev);
 
@@ -1954,12 +1952,10 @@ static int dwc3_probe(struct platform_device *pdev)
 	dwc3_free_event_buffers(dwc);
 
 err2:
-	pm_runtime_allow(&pdev->dev);
-
-err1:
-	pm_runtime_put_sync(&pdev->dev);
-	pm_runtime_disable(&pdev->dev);
-
+	pm_runtime_allow(dev);
+	pm_runtime_disable(dev);
+	pm_runtime_set_suspended(dev);
+	pm_runtime_put_noidle(dev);
 disable_clks:
 	dwc3_clk_disable(dwc);
 assert_reset:
-- 
2.39.2