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

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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>
This commit is contained in:
Lv Zheng 2015-12-25 11:22:32 +08:00 • committed by Rafael J. Wysocki
parent ec74765d9f
commit 59adb3988e
1 changed files with 2 additions and 1 deletions
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3
drivers/acpi/acpi_dbg.c
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@ -514,7 +514,7 @@ static int acpi_aml_open(struct inode *inode, struct file *file)
if (ACPI_FAILURE(status)) { if (ACPI_FAILURE(status)) {
pr_err("Failed to initialize debugger.\n"); pr_err("Failed to initialize debugger.\n");
ret = -EINVAL; ret = -EINVAL;
goto err_lock; goto err_exit;
} }
pr_debug("Debugger thread initialized.\n"); pr_debug("Debugger thread initialized.\n");
@ -531,6 +531,7 @@ err_lock:
acpi_aml_active_reader = NULL; acpi_aml_active_reader = NULL;
} }
mutex_unlock(&acpi_aml_io.lock); mutex_unlock(&acpi_aml_io.lock);
err_exit:
return ret; return ret;
} }