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platform/x86: wmi: release mutex on module acquistion failure 

This failure mode should have also released the mutex.

Signed-off-by: Mario Limonciello <mario.limonciello@dell.com>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>
This commit is contained in:
Mario Limonciello 2017-11-05 21:34:33 -06:00 committed by Darren Hart (VMware)
parent 54d11736ec
commit 5e3e22971f
1 changed files with 4 additions and 2 deletions
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6
drivers/platform/x86/wmi.c
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@ -868,8 +868,10 @@ static long wmi_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
/* let the driver do any filtering and do the call */
wdriver = container_of(wblock->dev.dev.driver,
struct wmi_driver, driver);
if (!try_module_get(wdriver->driver.owner))
return -EBUSY;
if (!try_module_get(wdriver->driver.owner)) {
ret = -EBUSY;
goto out_ioctl;
}
ret = wdriver->filter_callback(&wblock->dev, cmd, buf);
module_put(wdriver->driver.owner);
if (ret)