[PATCH 50/61] driver core: fix passing platform_data

Greg Kroah-Hartman
2009-03-25T00:48:27Z

From: Ming Lei <tom.leiming@gmail.com>

We will remove platform_data field from struct device until
all platform devices pass its specific data from platfom_device
and all platform drivers use platform specific data passed by
platform_device->platform_data. This kind of conversion will
need a long time, for thousands of files is affected.

To make the conversion easily, we allow platform specific data
passed by struct device or struct platform_device and platform
driver may use it from struct device or struct platform_device.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/base/platform.c | 15 ++++++++++++++-
1 files changed, 14 insertions(+), 1 deletions(-)

diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index c5ac81d..d2198f6 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -247,7 +247,20 @@ int platform_device_add(struct platform_device *pdev)
else
dev_set_name(&pdev->dev, pdev->name);

- pdev->platform_data = pdev->dev.platform_data;
+ /* We will remove platform_data field from struct device
+ * if all platform devices pass its platform specific data
+ * from platform_device. The conversion is going to be a
+ * long time, so we allow the two cases coexist to make
+ * this kind of fix more easily*/
+ if (pdev->platform_data && pdev->dev.platform_data) {
+ printk(KERN_ERR
+ "%s: use which platform_data?\n",
+ dev_name(&pdev->dev));
+ } else if (pdev->platform_data) {
+ pdev->dev.platform_data = pdev->platform_data;
+ } else if (pdev->dev.platform_data) {
+ pdev->platform_data = pdev->dev.platform_data;
+ }

for (i = 0; i < pdev->num_resources; i++) {
struct resource *p, *r = &pdev->resource[i];
--
1.6.2