linux-kernel - [PATCH v2] usb: dwc3: xilinx: improve error handling for PM APIs

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Message-ID: <1700590878-124335-1-git-send-email-radhey.shyam.pandey@amd.com>
Date:   Tue, 21 Nov 2023 23:51:18 +0530
From:   Radhey Shyam Pandey <radhey.shyam.pandey@....com>
To:     <Thinh.Nguyen@...opsys.com>, <gregkh@...uxfoundation.org>,
        <michal.simek@....com>
CC:     <linux-usb@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <git@....com>,
        Piyush Mehta <piyush.mehta@....com>,
        Radhey Shyam Pandey <radhey.shyam.pandey@....com>
Subject: [PATCH v2] usb: dwc3: xilinx: improve error handling for PM APIs

From: Piyush Mehta <piyush.mehta@....com>

Improve error handling for PM APIs in the dwc3_xlnx_probe function by
introducing devm_pm_runtime_enable and error label. Removed unnecessary
API pm_runtime_disable call in dwc3_xlnx_remove.

Signed-off-by: Piyush Mehta <piyush.mehta@....com>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@....com>
---
Changes for v2:
- Remove pm_runtime_enable() call.
---
 drivers/usb/dwc3/dwc3-xilinx.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/dwc3/dwc3-xilinx.c b/drivers/usb/dwc3/dwc3-xilinx.c
index 5b7e92f476de..6095f4dee6ce 100644
--- a/drivers/usb/dwc3/dwc3-xilinx.c
+++ b/drivers/usb/dwc3/dwc3-xilinx.c
@@ -293,11 +293,15 @@ static int dwc3_xlnx_probe(struct platform_device *pdev)
 		goto err_clk_put;
 
 	pm_runtime_set_active(dev);
-	pm_runtime_enable(dev);
+	ret = devm_pm_runtime_enable(dev);
+	if (ret < 0)
+		goto err_pm_set_suspended;
+
 	pm_suspend_ignore_children(dev, false);
-	pm_runtime_get_sync(dev);
+	return pm_runtime_resume_and_get(dev);
 
-	return 0;
+err_pm_set_suspended:
+	pm_runtime_set_suspended(dev);
 
 err_clk_put:
 	clk_bulk_disable_unprepare(priv_data->num_clocks, priv_data->clks);
@@ -315,7 +319,6 @@ static void dwc3_xlnx_remove(struct platform_device *pdev)
 	clk_bulk_disable_unprepare(priv_data->num_clocks, priv_data->clks);
 	priv_data->num_clocks = 0;
 
-	pm_runtime_disable(dev);
 	pm_runtime_put_noidle(dev);
 	pm_runtime_set_suspended(dev);
 }
-- 
2.34.1