Commit 722c902a authored by Todd Poynor's avatar Todd Poynor Committed by Greg Kroah-Hartman
Browse files

staging: gasket: hold mutex on gasket driver unregistration 



Take the global mutex on driver unregistration updates for proper
ordering of updates and consistent access procedures.

Signed-off-by: default avatarZhongze Hu <frankhu@chromium.org>
Signed-off-by: default avatarTodd Poynor <toddpoynor@google.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ba658584

drivers/staging/gasket/gasket_core.c

+4 −0
Original line number Diff line number Diff line
@@ -371,7 +371,9 @@ int gasket_register_device(const struct gasket_driver_desc *driver_desc) 
	class_destroy(internal->class);



unregister_gasket_driver:

	mutex_lock(&g_mutex);

	g_descs[desc_idx].driver_desc = NULL;

	mutex_unlock(&g_mutex);

	return ret;

}

EXPORT_SYMBOL(gasket_register_device);
@@ -408,7 +410,9 @@ void gasket_unregister_device(const struct gasket_driver_desc *driver_desc) 
	class_destroy(internal_desc->class);



	/* Finally, effectively "remove" the driver. */

	mutex_lock(&g_mutex);

	g_descs[desc_idx].driver_desc = NULL;

	mutex_unlock(&g_mutex);



	gasket_nodev_info("removed %s driver", driver_desc->name);

}