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Message-ID: <MW5PR84MB1842F4C102CBFA73E861F420AB0D2@MW5PR84MB1842.NAMPRD84.PROD.OUTLOOK.COM>
Date: Fri, 19 Apr 2024 19:59:48 +0000
From: "Elliott, Robert (Servers)" <elliott@....com>
To: Aapo Vienamo <aapo.vienamo@...ux.intel.com>,
Linus Walleij
<linus.walleij@...aro.org>,
Bartosz Golaszewski <brgl@...ev.pl>,
"Andy
Shevchenko" <andy@...nel.org>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
Mika Westerberg
<mika.westerberg@...ux.intel.com>,
Andy Shevchenko
<andriy.shevchenko@...ux.intel.com>
Subject: RE: [PATCH] gpio: Add Intel Granite Rapids-D vGPIO driver
> -----Original Message-----
> From: Aapo Vienamo <aapo.vienamo@...ux.intel.com>
> Sent: Friday, April 19, 2024 3:06 AM
> Subject: [PATCH] gpio: Add Intel Granite Rapids-D vGPIO driver
>
..
> +static int gnr_gpio_probe(struct platform_device *pdev)
> +{
> + size_t num_backup_pins = IS_ENABLED(CONFIG_PM_SLEEP) ? GNR_NUM_PINS
> : 0;
> + struct device *dev = &pdev->dev;
> + struct gpio_irq_chip *girq;
> + struct gnr_gpio *priv;
> + void __iomem *regs;
> + int irq, ret;
> +
> + priv = devm_kzalloc(dev, struct_size(priv, pad_backup,
> num_backup_pins), GFP_KERNEL);
> + if (!priv)
> + return -ENOMEM;
> +
> + regs = devm_platform_ioremap_resource(pdev, 0);
> + if (IS_ERR(regs))
> + return PTR_ERR(regs);
> +
> + irq = platform_get_irq(pdev, 0);
> + if (irq < 0)
> + return irq;
> +
> + ret = devm_request_irq(dev, irq, gnr_gpio_irq, IRQF_SHARED |
> IRQF_NO_THREAD,
> + dev_name(dev), priv);
> + if (ret)
> + return dev_err_probe(dev, ret, "failed to request interrupt\n");
All of these early returns will leave the memory allocated to priv
forever, since priv isn't saved anywhere until:
> + platform_set_drvdata(pdev, priv);
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