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usb: dwc3: imx8mp: use scoped device node handling to simplify error paths

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Obtain the device node reference with scoped/cleanup.h to reduce error
handling and make the code a bit simpler.  Scoped/cleanup.h coding style
expects variable declaration with initialization, so the
of_get_compatible_child() call has to be moved earlier, before any goto
jumps happen.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20240814-b4-cleanup-h-of-node-put-usb-v1-6-95481b9682bc@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Krzysztof Kozlowski
2024-08-14 12:35:42 +02:00
committed by Greg Kroah-Hartman
parent 81d905b102
commit 34e8df2fb2
1 changed files with 8 additions and 12 deletions
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20
drivers/usb/dwc3/dwc3-imx8mp.c
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@@ -5,6 +5,7 @@
* Copyright (c) 2020 NXP.
*/
#include <linux/cleanup.h>
#include <linux/clk.h>
#include <linux/interrupt.h>
#include <linux/io.h>
@@ -147,7 +148,7 @@ static irqreturn_t dwc3_imx8mp_interrupt(int irq, void *_dwc3_imx)
static int dwc3_imx8mp_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *dwc3_np, *node = dev->of_node;
struct device_node *node = dev->of_node;
struct dwc3_imx8mp *dwc3_imx;
struct resource *res;
int err, irq;
@@ -193,6 +194,11 @@ static int dwc3_imx8mp_probe(struct platform_device *pdev)
return irq;
dwc3_imx->irq = irq;
struct device_node *dwc3_np __free(device_node) = of_get_compatible_child(node,
"snps,dwc3");
if (!dwc3_np)
return dev_err_probe(dev, -ENODEV, "failed to find dwc3 core child\n");
imx8mp_configure_glue(dwc3_imx);
pm_runtime_set_active(dev);
@@ -201,17 +207,10 @@ static int dwc3_imx8mp_probe(struct platform_device *pdev)
if (err < 0)
goto disable_rpm;
dwc3_np = of_get_compatible_child(node, "snps,dwc3");
if (!dwc3_np) {
err = -ENODEV;
dev_err(dev, "failed to find dwc3 core child\n");
goto disable_rpm;
}
err = of_platform_populate(node, NULL, NULL, dev);
if (err) {
dev_err(&pdev->dev, "failed to create dwc3 core\n");
goto err_node_put;
goto disable_rpm;
}
dwc3_imx->dwc3 = of_find_device_by_node(dwc3_np);
@@ -220,7 +219,6 @@ static int dwc3_imx8mp_probe(struct platform_device *pdev)
err = -ENODEV;
goto depopulate;
}
of_node_put(dwc3_np);
err = devm_request_threaded_irq(dev, irq, NULL, dwc3_imx8mp_interrupt,
IRQF_ONESHOT, dev_name(dev), dwc3_imx);
@@ -236,8 +234,6 @@ static int dwc3_imx8mp_probe(struct platform_device *pdev)
depopulate:
of_platform_depopulate(dev);
err_node_put:
of_node_put(dwc3_np);
disable_rpm:
pm_runtime_disable(dev);
pm_runtime_put_noidle(dev);