[PATCH 04/10] usb: host: ehci-atmel: fix deferred probing

[Sergey Shtylyov]

The driver overrides the error codes (and also IRQ0) returned by
platform_get_irq() to -ENODEV, so if it returns -EPROBE_DEFER, the driver
will fail the probe permanently instead of the deferred probing. Switch to
propagating the error codes upstream -- that means we have to explicitly
filter out IRQ0 as bad since usb_add_hcd() doesn't quite like it... :-)

Fixes: 501c9c0802d9 ("USB: at91: Add USB EHCI driver for at91sam9g45 series")
Signed-off-by: Sergey Shtylyov <s.shtylyov at omp.ru>
---
 drivers/usb/host/ehci-atmel.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/host/ehci-atmel.c b/drivers/usb/host/ehci-atmel.c
index 05d41fd65f25..3f7c8ccc6d7f 100644
--- a/drivers/usb/host/ehci-atmel.c
+++ b/drivers/usb/host/ehci-atmel.c
@@ -104,8 +104,12 @@ static int ehci_atmel_drv_probe(struct platform_device *pdev)
 	pr_debug("Initializing Atmel-SoC USB Host Controller\n");
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq <= 0) {
-		retval = -ENODEV;
+	if (irq < 0) {
+		retval = irq;
+		goto fail_create_hcd;
+	}
+	if (!irq) {
+		retval = -EINVAL;
 		goto fail_create_hcd;
 	}
 
-- 
2.26.3