USB: gadgetfs, dummy-hcd, net2280: fix locking for callbacks

[firefly-linux-kernel-4.4.55.git] / drivers / parport / share.c

diff --git a/drivers/parport/share.c b/drivers/parport/share.c
index 5ce5ef211bdbdf575752e150edc6e26cc683e82d..754f21fd976893717fdd494d4b00103a27f46123 100644 (file)
--- a/drivers/parport/share.c
+++ b/drivers/parport/share.c
@@ -936,8 +936,10 @@ parport_register_dev_model(struct parport *port, const char *name,
         * pardevice fields. -arca
         */
        port->ops->init_state(par_dev, par_dev->state);
-       port->proc_device = par_dev;
-       parport_device_proc_register(par_dev);
+       if (!test_and_set_bit(PARPORT_DEVPROC_REGISTERED, &port->devflags)) {
+               port->proc_device = par_dev;
+               parport_device_proc_register(par_dev);
+       }
 
        return par_dev;