staging: emxx_udc: Add comment for spinlock_t definition.
authorVarsha Rao <rvarsha016@gmail.com>
Thu, 2 Mar 2017 17:57:11 +0000 (23:27 +0530)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 9 Mar 2017 13:13:51 +0000 (14:13 +0100)
Members of nbu2ss_udc structure can change device state, maintain
completion state and control driver. Also provide access to read and
write to register. Hence, exclusive access to nbu2ss_udc is required.
The lock variable of type spinlock_t guarantees the exclusive access
and protects it.

In this patch, comment is added for spinlock_t definition, to fix the
following checkpatch issue:

CHECK: spinlock_t definition without comment

Signed-off-by: Varsha Rao <rvarsha016@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/staging/emxx_udc/emxx_udc.h

index 789bfb97143cf2d886b295bae8ffe377bf64d5be..78c08e15a1f9220d0c836ee8b944d19a381f4fd8 100644 (file)
@@ -567,7 +567,7 @@ struct nbu2ss_udc {
        struct usb_gadget_driver *driver;
        struct platform_device *pdev;
        struct device *dev;
-       spinlock_t lock;
+       spinlock_t lock; /* Protects nbu2ss_udc structure fields */
        struct completion               *pdone;
 
        enum ep0_state                  ep0state;