From: Adrian Bunk <bunk@stusta.de>

This patch fixes an obvious use-after-free introduced by
commit 837012ede14a8fc088be3682c964da7fc6af026b.

Spotted by the Coverity checker.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Cc: Alexey Starikovskiy <astarikovskiy@suse.de>
Cc: Len Brown <len.brown@intel.com>
Cc: Michal Piotrowski <michal.k.k.piotrowski@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/acpi/ec.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff -puN drivers/acpi/ec.c~acpi_ec_remove-fix-use-after-free drivers/acpi/ec.c
--- a/drivers/acpi/ec.c~acpi_ec_remove-fix-use-after-free
+++ a/drivers/acpi/ec.c
@@ -734,14 +734,14 @@ static int acpi_ec_add(struct acpi_devic
 static int acpi_ec_remove(struct acpi_device *device, int type)
 {
 	struct acpi_ec *ec;
-	struct acpi_ec_query_handler *handler;
+	struct acpi_ec_query_handler *handler, *tmp;
 
 	if (!device)
 		return -EINVAL;
 
 	ec = acpi_driver_data(device);
 	mutex_lock(&ec->lock);
-	list_for_each_entry(handler, &ec->list, node) {
+	list_for_each_entry_safe(handler, tmp, &ec->list, node) {
 		list_del(&handler->node);
 		kfree(handler);
 	}
_