From: Lv Zheng <lv.zheng@intel.com>
Date: Fri, 25 Dec 2015 03:22:32 +0000 (+0800)
Subject: ACPI / debugger: Fix a redundant mutex unlock issue in acpi_aml_open()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=59adb3988ebeec012343317ac783d6a7935e0c83;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

ACPI / debugger: Fix a redundant mutex unlock issue in acpi_aml_open()

Fix a double mutex_unlock() issue where acpi_initialize_debugger() is
called with the mutex already unlocked.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

diff --git a/drivers/acpi/acpi_dbg.c b/drivers/acpi/acpi_dbg.c
index e8d1698c15bb..15e4604efba7 100644
--- a/drivers/acpi/acpi_dbg.c
+++ b/drivers/acpi/acpi_dbg.c
@@ -514,7 +514,7 @@ static int acpi_aml_open(struct inode *inode, struct file *file)
 		if (ACPI_FAILURE(status)) {
 			pr_err("Failed to initialize debugger.\n");
 			ret = -EINVAL;
-			goto err_lock;
+			goto err_exit;
 		}
 		pr_debug("Debugger thread initialized.\n");
 
@@ -531,6 +531,7 @@ err_lock:
 			acpi_aml_active_reader = NULL;
 	}
 	mutex_unlock(&acpi_aml_io.lock);
+err_exit:
 	return ret;
 }