ACPI / resources: free memory on error in add_region_before()

There is a small memory leak on error.

Fixes: 0f1b414d1907 (ACPI / PNP: Avoid conflicting resource reservations)
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index fcb7807ea8b7..10561ce16ed1 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -660,8 +660,10 @@ static int add_region_before(u64 start, u64 end, u8 space_id,
                 return -ENOMEM;
 
         error = request_range(start, end, space_id, flags, desc);
-        if (error)
+        if (error) {
+                kfree(reg);
                 return error;
+        }
 
         reg->start = start;
         reg->end = end;