[PATCH 4/5] gpio: brcmstb: don't turn platform_get_irq errors into -ENOENT

[shao.mingyin]

From: Shao Mingyin <shao.mingyin@xxxxxxxxxx>

When the "interrupt-controller" property is present, brcmstb_gpio_probe()
maps any platform_get_irq() failure to -ENOENT.  This swallows
-EPROBE_DEFER (the parent interrupt controller may not be probed yet),
so the device never gets retried and the GPIO controller is permanently
unavailable.  Return the original error code instead.

Fixes: 19a7b6940b78 ("gpio: brcmstb: Add interrupt and wakeup source support")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Shao Mingyin <shao.mingyin@xxxxxxxxxx>
---
 drivers/gpio/gpio-brcmstb.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpio-brcmstb.c b/drivers/gpio/gpio-brcmstb.c
index 3b1aaea639..e23e8f267f 100644
--- a/drivers/gpio/gpio-brcmstb.c
+++ b/drivers/gpio/gpio-brcmstb.c
@@ -655,7 +655,7 @@
 	if (of_property_read_bool(np, "interrupt-controller")) {
 		priv->parent_irq = platform_get_irq(pdev, 0);
-		if (priv->parent_irq <= 0)
-			return -ENOENT;
+		if (priv->parent_irq < 0)
+			return priv->parent_irq;
 	} else {
 		priv->parent_irq = -ENOENT;
 	}