linux-kernel - [PATCH 04/12] gpio: pch: use resource management for irqs

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Date:   Sat,  4 Mar 2017 17:23:32 +0100
From:   Bartosz Golaszewski <bgolaszewski@...libre.com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Alexandre Courbot <gnurou@...il.com>,
        Bamvor Jian Zhang <bamvor.zhangjian@...aro.org>,
        Grygorii Strashko <grygorii.strashko@...com>,
        Santosh Shilimkar <ssantosh@...nel.org>,
        Kevin Hilman <khilman@...nel.org>,
        Robert Jarzmik <robert.jarzmik@...e.fr>
Cc:     linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-omap@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <marc.zyngier@....com>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: [PATCH 04/12] gpio: pch: use resource management for irqs

Use device resource managed variants of irq_alloc_descs() and
request_irq() and remove the code manually freeing irq resources.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
---
 drivers/gpio/gpio-pch.c | 14 ++++----------
 1 file changed, 4 insertions(+), 10 deletions(-)

diff --git a/drivers/gpio/gpio-pch.c b/drivers/gpio/gpio-pch.c
index 7c7135d..71bc6da 100644
--- a/drivers/gpio/gpio-pch.c
+++ b/drivers/gpio/gpio-pch.c
@@ -403,7 +403,8 @@ static int pch_gpio_probe(struct pci_dev *pdev,
 		goto err_gpiochip_add;
 	}
 
-	irq_base = irq_alloc_descs(-1, 0, gpio_pins[chip->ioh], NUMA_NO_NODE);
+	irq_base = devm_irq_alloc_descs(&pdev->dev, -1, 0,
+					gpio_pins[chip->ioh], NUMA_NO_NODE);
 	if (irq_base < 0) {
 		dev_warn(&pdev->dev, "PCH gpio: Failed to get IRQ base num\n");
 		chip->irq_base = -1;
@@ -416,8 +417,8 @@ static int pch_gpio_probe(struct pci_dev *pdev,
 	iowrite32(msk, &chip->reg->imask);
 	iowrite32(msk, &chip->reg->ien);
 
-	ret = request_irq(pdev->irq, pch_gpio_handler,
-			  IRQF_SHARED, KBUILD_MODNAME, chip);
+	ret = devm_request_irq(&pdev->dev, pdev->irq, pch_gpio_handler,
+			       IRQF_SHARED, KBUILD_MODNAME, chip);
 	if (ret != 0) {
 		dev_err(&pdev->dev,
 			"%s request_irq failed\n", __func__);
@@ -430,7 +431,6 @@ static int pch_gpio_probe(struct pci_dev *pdev,
 	return 0;
 
 err_request_irq:
-	irq_free_descs(irq_base, gpio_pins[chip->ioh]);
 	gpiochip_remove(&chip->gpio);
 
 err_gpiochip_add:
@@ -452,12 +452,6 @@ static void pch_gpio_remove(struct pci_dev *pdev)
 {
 	struct pch_gpio *chip = pci_get_drvdata(pdev);
 
-	if (chip->irq_base != -1) {
-		free_irq(pdev->irq, chip);
-
-		irq_free_descs(chip->irq_base, gpio_pins[chip->ioh]);
-	}
-
 	gpiochip_remove(&chip->gpio);
 	pci_iounmap(pdev, chip->base);
 	pci_release_regions(pdev);
-- 
2.9.3