staging: gasket: core: remove sysfs setup and cleanup callbacks

Gasket device drivers now call into the gasket framework to initialize
and de-initialize, rather than the other way around.  The calling code
can perform sysfs setup and cleanup actions without callbacks from the
framework.  Remove the sysfs setup and cleanup callbacks.
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/gasket/gasket_core.c

@@ -1489,18 +1489,9 @@ int gasket_pci_add_device(struct pci_dev *pci_dev,
 	if (ret)
 		goto fail4;
 
-	ret = check_and_invoke_callback(gasket_dev,
-					driver_desc->sysfs_setup_cb);
-	if (ret) {
-		dev_err(gasket_dev->dev, "Error in sysfs setup cb: %d\n", ret);
-		goto fail5;
-	}
-
 	*gasket_devp = gasket_dev;
 	return 0;
 
-fail5:
-	check_and_invoke_callback(gasket_dev, driver_desc->sysfs_cleanup_cb);
 fail4:
 fail3:
 	gasket_sysfs_remove_mapping(gasket_dev->dev_info.device);
@@ -1550,7 +1541,6 @@ void gasket_pci_remove_device(struct pci_dev *pci_dev)
 
 	gasket_cleanup_pci(gasket_dev);
 
-	check_and_invoke_callback(gasket_dev, driver_desc->sysfs_cleanup_cb);
 	gasket_sysfs_remove_mapping(gasket_dev->dev_info.device);
 	device_destroy(internal_desc->class, gasket_dev->dev_info.devt);
 	gasket_free_dev(gasket_dev);

drivers/staging/gasket/gasket_core.h

@@ -444,24 +444,6 @@ struct gasket_driver_desc {
 	 */
 	int (*device_close_cb)(struct gasket_dev *dev);
 
-	/*
-	 * sysfs_setup_cb: Callback to set up driver-specific sysfs nodes.
-	 * @dev: Pointer to the gasket_dev struct for this device.
-	 *
-	 * Called during the add gasket device call.
-	 *
-	 */
-	int (*sysfs_setup_cb)(struct gasket_dev *dev);
-
-	/*
-	 * sysfs_cleanup_cb: Callback to clean up driver-specific sysfs nodes.
-	 * @dev: Pointer to the gasket_dev struct for this device.
-	 *
-	 * Called during device disable processing.
-	 *
-	 */
-	int (*sysfs_cleanup_cb)(struct gasket_dev *dev);
-
 	/*
 	 * get_mappable_regions_cb: Get descriptors of mappable device memory.
 	 * @gasket_dev: Pointer to the struct gasket_dev for this device.