From: David Jander <david@protonic.nl>
Date: Tue, 14 Jun 2011 09:00:54 +0000 (+0200)
Subject: gpio/pca953x: Fix IRQ support.
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=c609c05db10dcb020f6869186e548a0596a78896;p=mv-sheeva.git

gpio/pca953x: Fix IRQ support.

It seems that in the normal case, IRQ_NOREQUEST needs to be explicitly
cleared, otherwise claiming the interrupt fails.
In the case of sparse interrupts, the descriptor needs to be allocated
first.

Signed-off-by: David Jander <david@protonic.nl>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
---

diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index 4b8446e98de..5e4d3f23156 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -517,8 +517,10 @@ out_failed:
 
 static void pca953x_irq_teardown(struct pca953x_chip *chip)
 {
-	if (chip->irq_base != -1)
+	if (chip->irq_base != -1) {
+		irq_free_descs(chip->irq_base, chip->gpio_chip.ngpio);
 		free_irq(chip->client->irq, chip);
+	}
 }
 #else /* CONFIG_GPIO_PCA953X_IRQ */
 static int pca953x_irq_setup(struct pca953x_chip *chip,