[PATCH] ACPI: fix the process flow for 0 which return from acpi_register_gsi

[MaJun]

The return value 0 from acpi_register_gsi() means irq mapping failed.
So, we should process this case in else branch.

Signed-off-by: MaJun <majun258@xxxxxxxxxx>
---
 drivers/acpi/resource.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index 56241eb..9918326 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -416,7 +416,7 @@ static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
 
 	res->flags = acpi_dev_irq_flags(triggering, polarity, shareable);
 	irq = acpi_register_gsi(NULL, gsi, triggering, polarity);
-	if (irq >= 0) {
+	if (irq > 0) {
 		res->start = irq;
 		res->end = irq;
 	} else {
-- 
1.7.12.4