From: Irina Tirdea <irina.tirdea@intel.com>
Date: Sun, 13 Mar 2016 01:02:58 +0000 (+0200)
Subject: mfd: core: Fix ACPI child matching by _HID/_CID
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=ee414de525a9abf29e8a1b0c1b6f79f9e875213a;p=openwrt%2Fstaging%2Fblogic.git

mfd: core: Fix ACPI child matching by _HID/_CID

If MDF child devices have separate ACPI nodes identified
by _HID/_CID, they will not be assigned the intended
ACPI companion.

acpi_match_device_ids will return 0 if a the child device
matches the _HID/_CID, so this patch changes the matching
condition to check for 0 on success.

Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Acked-by: Mika Westerberg <mika.westeberg@linux.intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---

diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
index 88bd1b1e47be..409da01effcd 100644
--- a/drivers/mfd/mfd-core.c
+++ b/drivers/mfd/mfd-core.c
@@ -107,7 +107,7 @@ static void mfd_acpi_add_device(const struct mfd_cell *cell,
 
 			strlcpy(ids[0].id, match->pnpid, sizeof(ids[0].id));
 			list_for_each_entry(child, &parent->children, node) {
-				if (acpi_match_device_ids(child, ids)) {
+				if (!acpi_match_device_ids(child, ids)) {
 					adev = child;
 					break;
 				}