[PATCH] spi: add bus methods instead of driver's ones

[dmitry pervushin]

The patch below replaces probe/remove/shutdown functions in device_driver structure by corresponding methods of spi_bus_type.

Signed-off-by: dmitry pervushin <dpervushin@xxxxxxxxxxxxx>
Index: linux-2.6.15.y/drivers/spi/spi.c
===================================================================
--- linux-2.6.15.y.orig/drivers/spi/spi.c
+++ linux-2.6.15.y/drivers/spi/spi.c
@@ -125,42 +125,40 @@ struct bus_type spi_bus_type = {
 	.dev_attrs	= spi_dev_attrs,
 	.match		= spi_match_device,
 	.uevent		= spi_uevent,
+	.probe		= spi_bus_probe,
+	.remove		= spi_bus_remove,
+	.shutdown	= spi_bus_shutdown,
 	.suspend	= spi_suspend,
 	.resume		= spi_resume,
 };
 EXPORT_SYMBOL_GPL(spi_bus_type);
 
 
-static int spi_drv_probe(struct device *dev)
+static int spi_bus_probe(struct device *dev)
 {
 	const struct spi_driver		*sdrv = to_spi_driver(dev->driver);
 
-	return sdrv->probe(to_spi_device(dev));
+	return sdrv->probe ? sdrv->probe(to_spi_device(dev)) : -ENODEV;
 }
 
-static int spi_drv_remove(struct device *dev)
+static int spi_bus_remove(struct device *dev)
 {
 	const struct spi_driver		*sdrv = to_spi_driver(dev->driver);
 
-	return sdrv->remove(to_spi_device(dev));
+	return sdrv->remove ? sdrv->remove(to_spi_device(dev)) : -EFAULT;
 }
 
-static void spi_drv_shutdown(struct device *dev)
+static void spi_bus_shutdown(struct device *dev)
 {
 	const struct spi_driver		*sdrv = to_spi_driver(dev->driver);
 
-	sdrv->shutdown(to_spi_device(dev));
+	if (sdrv->shutdown)
+		sdrv->shutdown(to_spi_device(dev));
 }
 
 int spi_register_driver(struct spi_driver *sdrv)
 {
 	sdrv->driver.bus = &spi_bus_type;
-	if (sdrv->probe)
-		sdrv->driver.probe = spi_drv_probe;
-	if (sdrv->remove)
-		sdrv->driver.remove = spi_drv_remove;
-	if (sdrv->shutdown)
-		sdrv->driver.shutdown = spi_drv_shutdown;
 	return driver_register(&sdrv->driver);
 }
 EXPORT_SYMBOL_GPL(spi_register_driver);


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