[tip:x86/apic] x86/ioapic: Fix setup_res() failing to get resource

[tip-bot for Rui Wang]

Commit-ID:  6ab7eba5db93c11d61f6f7fbe21edbc875b26c1a
Gitweb:     http://git.kernel.org/tip/6ab7eba5db93c11d61f6f7fbe21edbc875b26c1a
Author:     Rui Wang <rui.y.wang@xxxxxxxxx>
AuthorDate: Wed, 17 Aug 2016 16:00:35 +0800
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Thu, 18 Aug 2016 11:45:18 +0200

x86/ioapic: Fix setup_res() failing to get resource

acpi_dev_filter_resource_type() returns 0 on success, and 1 on failure.
A return value of zero means there's a matching resource, so we should
continue within setup_res() to get the resource.

Signed-off-by: Rui Wang <rui.y.wang@xxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: bhelgaas@xxxxxxxxxx
Cc: helgaas@xxxxxxxxxx
Cc: linux-acpi@xxxxxxxxxxxxxxx
Cc: linux-pci@xxxxxxxxxxxxxxx
Cc: rjw@xxxxxxxxxxxxx
Cc: tony.luck@xxxxxxxxx
Link: http://lkml.kernel.org/r/1471420837-31003-4-git-send-email-rui.y.wang@xxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 drivers/acpi/ioapic.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/acpi/ioapic.c b/drivers/acpi/ioapic.c
index 2449377..8ab6d42 100644
--- a/drivers/acpi/ioapic.c
+++ b/drivers/acpi/ioapic.c
@@ -46,7 +46,7 @@ static acpi_status setup_res(struct acpi_resource *acpi_res, void *data)
 	struct resource_win win;
 
 	res->flags = 0;
-	if (acpi_dev_filter_resource_type(acpi_res, IORESOURCE_MEM) == 0)
+	if (acpi_dev_filter_resource_type(acpi_res, IORESOURCE_MEM))
 		return AE_OK;
 
 	if (!acpi_dev_resource_memory(acpi_res, res)) {