x86/cpu: Add CLZERO detection

[karo-tx-linux.git] / drivers / gpio / gpio-mxs.c

diff --git a/drivers/gpio/gpio-mxs.c b/drivers/gpio/gpio-mxs.c
index b7f383eb18d91e2f82831e4813b987d74d18d77b..a4288f428819a3175d2e74cb2feec138ffacb4dc 100644 (file)
--- a/drivers/gpio/gpio-mxs.c
+++ b/drivers/gpio/gpio-mxs.c
@@ -154,7 +154,7 @@ static void mxs_flip_edge(struct mxs_gpio_port *port, u32 gpio)
 }
 
 /* MXS has one interrupt *per* gpio port */
-static void mxs_gpio_irq_handler(u32 irq, struct irq_desc *desc)
+static void mxs_gpio_irq_handler(struct irq_desc *desc)
 {
        u32 irq_stat;
        struct mxs_gpio_port *port = irq_desc_get_handler_data(desc);
@@ -196,13 +196,16 @@ static int mxs_gpio_set_wake_irq(struct irq_data *d, unsigned int enable)
        return 0;
 }
 
-static void __init mxs_gpio_init_gc(struct mxs_gpio_port *port, int irq_base)
+static int __init mxs_gpio_init_gc(struct mxs_gpio_port *port, int irq_base)
 {
        struct irq_chip_generic *gc;
        struct irq_chip_type *ct;
 
        gc = irq_alloc_generic_chip("gpio-mxs", 1, irq_base,
                                    port->base, handle_level_irq);
+       if (!gc)
+               return -ENOMEM;
+
        gc->private = port;
 
        ct = gc->chip_types;
@@ -216,6 +219,8 @@ static void __init mxs_gpio_init_gc(struct mxs_gpio_port *port, int irq_base)
 
        irq_setup_generic_chip(gc, IRQ_MSK(32), IRQ_GC_INIT_NESTED_LOCK,
                               IRQ_NOREQUEST, 0);
+
+       return 0;
 }
 
 static int mxs_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
@@ -317,7 +322,9 @@ static int mxs_gpio_probe(struct platform_device *pdev)
        }
 
        /* gpio-mxs can be a generic irq chip */
-       mxs_gpio_init_gc(port, irq_base);
+       err = mxs_gpio_init_gc(port, irq_base);
+       if (err < 0)
+               goto out_irqdomain_remove;
 
        /* setup one handler for each entry */
        irq_set_chained_handler_and_data(port->irq, mxs_gpio_irq_handler,
@@ -343,6 +350,8 @@ static int mxs_gpio_probe(struct platform_device *pdev)
 
 out_bgpio_remove:
        bgpio_remove(&port->bgc);
+out_irqdomain_remove:
+       irq_domain_remove(port->domain);
 out_irqdesc_free:
        irq_free_descs(irq_base, 32);
        return err;