Merge tag 'gpio-fixes-for-v6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux

Pull gpio fixes from Bartosz Golaszewski:

 - fix a NULL-pointer dereference at driver unbind and a potential
   resource leak in error path in gpio-mockup

 - make the irqchip immutable in gpio-ftgpio010

 - fix dereferencing a potentially uninitialized variable in gpio-tqmx86

 - fix interrupt registering in gpiolib's character device code

* tag 'gpio-fixes-for-v6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
  gpiolib: cdev: Set lineevent_state::irq after IRQ register successfully
  gpio: tqmx86: fix uninitialized variable girq
  gpio: ftgpio010: Make irqchip immutable
  gpio: mockup: Fix potential resource leakage when register a chip
  gpio: mockup: fix NULL pointer dereference when removing debugfs

Author: torvalds

drivers/gpio/gpio-ftgpio010.c

@@ -41,14 +41,12 @@
  * struct ftgpio_gpio - Gemini GPIO state container
  * @dev: containing device for this instance
  * @gc: gpiochip for this instance
- * @irq: irqchip for this instance
  * @base: remapped I/O-memory base
  * @clk: silicon clock
  */
 struct ftgpio_gpio {
 	struct device *dev;
 	struct gpio_chip gc;
-	struct irq_chip irq;
 	void __iomem *base;
 	struct clk *clk;
 };
@@ -70,6 +68,7 @@ static void ftgpio_gpio_mask_irq(struct irq_data *d)
 	val = readl(g->base + GPIO_INT_EN);
 	val &= ~BIT(irqd_to_hwirq(d));
 	writel(val, g->base + GPIO_INT_EN);
+	gpiochip_disable_irq(gc, irqd_to_hwirq(d));
 }
 
 static void ftgpio_gpio_unmask_irq(struct irq_data *d)
@@ -78,6 +77,7 @@ static void ftgpio_gpio_unmask_irq(struct irq_data *d)
 	struct ftgpio_gpio *g = gpiochip_get_data(gc);
 	u32 val;
 
+	gpiochip_enable_irq(gc, irqd_to_hwirq(d));
 	val = readl(g->base + GPIO_INT_EN);
 	val |= BIT(irqd_to_hwirq(d));
 	writel(val, g->base + GPIO_INT_EN);
@@ -221,6 +221,16 @@ static int ftgpio_gpio_set_config(struct gpio_chip *gc, unsigned int offset,
 	return 0;
 }
 
+static const struct irq_chip ftgpio_irq_chip = {
+	.name = "FTGPIO010",
+	.irq_ack = ftgpio_gpio_ack_irq,
+	.irq_mask = ftgpio_gpio_mask_irq,
+	.irq_unmask = ftgpio_gpio_unmask_irq,
+	.irq_set_type = ftgpio_gpio_set_irq_type,
+	.flags = IRQCHIP_IMMUTABLE,
+	 GPIOCHIP_IRQ_RESOURCE_HELPERS,
+};
+
 static int ftgpio_gpio_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -277,14 +287,8 @@ static int ftgpio_gpio_probe(struct platform_device *pdev)
 	if (!IS_ERR(g->clk))
 		g->gc.set_config = ftgpio_gpio_set_config;
 
-	g->irq.name = "FTGPIO010";
-	g->irq.irq_ack = ftgpio_gpio_ack_irq;
-	g->irq.irq_mask = ftgpio_gpio_mask_irq;
-	g->irq.irq_unmask = ftgpio_gpio_unmask_irq;
-	g->irq.irq_set_type = ftgpio_gpio_set_irq_type;
-
 	girq = &g->gc.irq;
-	girq->chip = &g->irq;
+	gpio_irq_chip_set_chip(girq, &ftgpio_irq_chip);
 	girq->parent_handler = ftgpio_gpio_irq_handler;
 	girq->num_parents = 1;
 	girq->parents = devm_kcalloc(dev, 1, sizeof(*girq->parents),

drivers/gpio/gpio-mockup.c

@@ -533,8 +533,10 @@ static int __init gpio_mockup_register_chip(int idx)
 	}
 
 	fwnode = fwnode_create_software_node(properties, NULL);
-	if (IS_ERR(fwnode))
+	if (IS_ERR(fwnode)) {
+		kfree_strarray(line_names, ngpio);
 		return PTR_ERR(fwnode);
+	}
 
 	pdevinfo.name = "gpio-mockup";
 	pdevinfo.id = idx;
@@ -597,9 +599,9 @@ static int __init gpio_mockup_init(void)
 
 static void __exit gpio_mockup_exit(void)
 {
+	gpio_mockup_unregister_pdevs();
 	debugfs_remove_recursive(gpio_mockup_dbg_dir);
 	platform_driver_unregister(&gpio_mockup_driver);
-	gpio_mockup_unregister_pdevs();
 }
 
 module_init(gpio_mockup_init);

drivers/gpio/gpio-tqmx86.c

@@ -307,6 +307,8 @@ static int tqmx86_gpio_probe(struct platform_device *pdev)
 		girq->default_type = IRQ_TYPE_NONE;
 		girq->handler = handle_simple_irq;
 		girq->init_valid_mask = tqmx86_init_irq_valid_mask;
+
+		irq_domain_set_pm_device(girq->domain, dev);
 	}
 
 	ret = devm_gpiochip_add_data(dev, chip, gpio);
@@ -315,8 +317,6 @@ static int tqmx86_gpio_probe(struct platform_device *pdev)
 		goto out_pm_dis;
 	}
 
-	irq_domain_set_pm_device(girq->domain, dev);
-
 	dev_info(dev, "GPIO functionality initialized with %d pins\n",
 		 chip->ngpio);
 

drivers/gpio/gpiolib-cdev.c

@@ -1986,7 +1986,6 @@ static int lineevent_create(struct gpio_device *gdev, void __user *ip)
 		ret = -ENODEV;
 		goto out_free_le;
 	}
-	le->irq = irq;
 
 	if (eflags & GPIOEVENT_REQUEST_RISING_EDGE)
 		irqflags |= test_bit(FLAG_ACTIVE_LOW, &desc->flags) ?
@@ -2000,7 +1999,7 @@ static int lineevent_create(struct gpio_device *gdev, void __user *ip)
 	init_waitqueue_head(&le->wait);
 
 	/* Request a thread to read the events */
-	ret = request_threaded_irq(le->irq,
+	ret = request_threaded_irq(irq,
 				   lineevent_irq_handler,
 				   lineevent_irq_thread,
 				   irqflags,
@@ -2009,6 +2008,8 @@ static int lineevent_create(struct gpio_device *gdev, void __user *ip)
 	if (ret)
 		goto out_free_le;
 
+	le->irq = irq;
+
 	fd = get_unused_fd_flags(O_RDONLY | O_CLOEXEC);
 	if (fd < 0) {
 		ret = fd;