Commit 9e26b0b1 authored by Peng Fan's avatar Peng Fan Committed by Linus Walleij

gpio: mxc: need to check return value of irq_alloc_generic_chip

Need to check return value of irq_alloc_generic_chip, because
it may return NULL.
1. Change mxc_gpio_init_gc return type from void to int.
2. Add a new lable out_irqdomain_remove to remove the irq domain
   when mxc_gpio_init_gc fail.
Signed-off-by: default avatarPeng Fan <van.freenix@gmail.com>
Cc: Alexandre Courbot <gnurou@gmail.com>
[Manually rebased]
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 6ff33f39
...@@ -339,13 +339,15 @@ static int gpio_set_wake_irq(struct irq_data *d, u32 enable) ...@@ -339,13 +339,15 @@ static int gpio_set_wake_irq(struct irq_data *d, u32 enable)
return 0; return 0;
} }
static void mxc_gpio_init_gc(struct mxc_gpio_port *port, int irq_base) static int mxc_gpio_init_gc(struct mxc_gpio_port *port, int irq_base)
{ {
struct irq_chip_generic *gc; struct irq_chip_generic *gc;
struct irq_chip_type *ct; struct irq_chip_type *ct;
gc = irq_alloc_generic_chip("gpio-mxc", 1, irq_base, gc = irq_alloc_generic_chip("gpio-mxc", 1, irq_base,
port->base, handle_level_irq); port->base, handle_level_irq);
if (!gc)
return -ENOMEM;
gc->private = port; gc->private = port;
ct = gc->chip_types; ct = gc->chip_types;
...@@ -360,6 +362,8 @@ static void mxc_gpio_init_gc(struct mxc_gpio_port *port, int irq_base) ...@@ -360,6 +362,8 @@ static void mxc_gpio_init_gc(struct mxc_gpio_port *port, int irq_base)
irq_setup_generic_chip(gc, IRQ_MSK(32), IRQ_GC_INIT_NESTED_LOCK, irq_setup_generic_chip(gc, IRQ_MSK(32), IRQ_GC_INIT_NESTED_LOCK,
IRQ_NOREQUEST, 0); IRQ_NOREQUEST, 0);
return 0;
} }
static void mxc_gpio_get_hw(struct platform_device *pdev) static void mxc_gpio_get_hw(struct platform_device *pdev)
...@@ -477,12 +481,16 @@ static int mxc_gpio_probe(struct platform_device *pdev) ...@@ -477,12 +481,16 @@ static int mxc_gpio_probe(struct platform_device *pdev)
} }
/* gpio-mxc can be a generic irq chip */ /* gpio-mxc can be a generic irq chip */
mxc_gpio_init_gc(port, irq_base); err = mxc_gpio_init_gc(port, irq_base);
if (err < 0)
goto out_irqdomain_remove;
list_add_tail(&port->node, &mxc_gpio_ports); list_add_tail(&port->node, &mxc_gpio_ports);
return 0; return 0;
out_irqdomain_remove:
irq_domain_remove(port->domain);
out_irqdesc_free: out_irqdesc_free:
irq_free_descs(irq_base, 32); irq_free_descs(irq_base, 32);
out_gpiochip_remove: out_gpiochip_remove:
......
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