Revert driver core: move platform_data into platform_device

This reverts commit 006f4571a15fae3a0575f2a0f9e9b63b3d1012f8:

	This patch moves platform_data from struct device into
	struct platform_device, based on the two ideas:

	1. Now all platform_driver is registered by platform_driver_register,
	   which makes probe()/release()/... of platform_driver passed parameter
	   of platform_device *, so platform driver can get platform_data from
	   platform_device;

	2. Other kind of devices do not need to use platform_data, we can
	   decrease size of device if moving it to platform_device.

	Taking into consideration of thousands of files to be fixed and they
	can't be finished in one night(maybe it will take a long time), so we
	keep platform_data in device to allow two kind of cases coexist until
	all platform devices pass its platfrom data from
	platform_device->platform_data.

	All patches to do this kind of conversion are welcome.

As we don't really want to do it, it was a bad idea.

Cc: David Brownell <david-b@pacbell.net>
Cc: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index d1d0ee4..8b4708e 100644 (file)
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -217,7 +217,6 @@ int platform_device_add_data(struct platform_device *pdev, const void *data,
        if (d) {
                memcpy(d, data, size);
                pdev->dev.platform_data = d;
-               pdev->platform_data = d;
        }
        return d ? 0 : -ENOMEM;
 }
@@ -247,8 +246,6 @@ int platform_device_add(struct platform_device *pdev)
        else
                dev_set_name(&pdev->dev, pdev->name);
 
-       pdev->platform_data = pdev->dev.platform_data;
-
        for (i = 0; i < pdev->num_resources; i++) {
                struct resource *p, *r = &pdev->resource[i];
 

diff --git a/include/linux/device.h b/include/linux/device.h
index 6a69caa..5d5c197 100644 (file)
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -384,13 +384,8 @@ struct device {
        struct device_driver *driver;   /* which driver has allocated this
                                           device */
        void            *driver_data;   /* data private to the driver */
-
-       void            *platform_data; /* We will remove platform_data
-                                          field if all platform devices
-                                          pass its platform specific data
-                                          from platform_device->platform_data,
-                                          other kind of devices should not
-                                          use platform_data. */
+       void            *platform_data; /* Platform specific data, device
+                                          core doesn't touch it */
        struct dev_pm_info      power;
 
 #ifdef CONFIG_NUMA

diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index 72736fd..b67bb5d 100644 (file)
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -20,7 +20,6 @@ struct platform_device {
        struct device   dev;
        u32             num_resources;
        struct resource * resource;
-       void            *platform_data;
 
        struct platform_device_id       *id_entry;
 };