USB: gpio_vbus: handle IRQ flags properly
Currently, 'res->flags' handlings are wrong in three respects:
* the driver _modifies_ the contents of platform data
* res->flags is set up, but not used anywhere in the driver
* request_irq() always takes VBUS_IRQ_FLAGS, regardless of refs->flags
This patch tries to fix this with a policy: If a platform IRQ resource
is available, give preference to its IRQ flag(s) over a default one
(VBUS_IRQ_FLAGS).
Signed-off-by: Shinya Kuribayashi <shinya.kuribayashi.px@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/otg/gpio_vbus.c b/drivers/usb/otg/gpio_vbus.c
index 4e393ef..00e763e 100644
--- a/drivers/usb/otg/gpio_vbus.c
+++ b/drivers/usb/otg/gpio_vbus.c
@@ -242,6 +242,7 @@
struct gpio_vbus_data *gpio_vbus;
struct resource *res;
int err, gpio, irq;
+ unsigned long irqflags;
if (!pdata || !gpio_is_valid(pdata->gpio_vbus))
return -EINVAL;
@@ -278,10 +279,11 @@
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (res) {
irq = res->start;
- res->flags &= IRQF_TRIGGER_MASK;
- res->flags |= IRQF_SHARED;
- } else
+ irqflags = (res->flags & IRQF_TRIGGER_MASK) | IRQF_SHARED;
+ } else {
irq = gpio_to_irq(gpio);
+ irqflags = VBUS_IRQ_FLAGS;
+ }
gpio_vbus->irq = irq;
@@ -299,8 +301,7 @@
gpio_direction_output(gpio, pdata->gpio_pullup_inverted);
}
- err = request_irq(irq, gpio_vbus_irq, VBUS_IRQ_FLAGS,
- "vbus_detect", pdev);
+ err = request_irq(irq, gpio_vbus_irq, irqflags, "vbus_detect", pdev);
if (err) {
dev_err(&pdev->dev, "can't request irq %i, err: %d\n",
irq, err);