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authorGrant Likely <grant.likely@secretlab.ca>2010-10-20 11:45:13 -0600
committerGrant Likely <grant.likely@secretlab.ca>2010-10-21 11:10:10 -0600
commit7096d0422153ffcc2264eef652fc3a7bca3e6d3c (patch)
tree2be6139f1e26acb4d0680e50a87623bc18938147 /drivers/of
parentbda80da469a93122121de601dd469ce1aaa6effa (diff)
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of/device: Rework to use common platform_device_alloc() for allocating devices
The current code allocates and manages platform_devices created from the device tree manually. It also uses an unsafe shortcut for allocating the platform_device and the resource table at the same time. (which I added in the last rework; sorry). This patch refactors the code to use platform_device_alloc() for allocating new devices. This reduces the amount of custom code implemented by of_platform, eliminates the unsafe alloc trick, and has the side benefit of letting the platform_bus code manage freeing the device data and resources when the device is freed. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: "David S. Miller" <davem@davemloft.net> Cc: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/device.c27
-rw-r--r--drivers/of/platform.c24
2 files changed, 20 insertions, 31 deletions
diff --git a/drivers/of/device.c b/drivers/of/device.c
index 92de0eb..45d8653 100644
--- a/drivers/of/device.c
+++ b/drivers/of/device.c
@@ -81,29 +81,10 @@ struct device_attribute of_platform_device_attrs[] = {
__ATTR_NULL
};
-/**
- * of_release_dev - free an of device structure when all users of it are finished.
- * @dev: device that's been disconnected
- *
- * Will be called only by the device core when all users of this of device are
- * done.
- */
-void of_release_dev(struct device *dev)
-{
- struct platform_device *ofdev;
-
- ofdev = to_platform_device(dev);
- of_node_put(ofdev->dev.of_node);
- kfree(ofdev);
-}
-EXPORT_SYMBOL(of_release_dev);
-
-int of_device_register(struct platform_device *ofdev)
+int of_device_add(struct platform_device *ofdev)
{
BUG_ON(ofdev->dev.of_node == NULL);
- device_initialize(&ofdev->dev);
-
/* name and id have to be set so that the platform bus doesn't get
* confused on matching */
ofdev->name = dev_name(&ofdev->dev);
@@ -117,6 +98,12 @@ int of_device_register(struct platform_device *ofdev)
return device_add(&ofdev->dev);
}
+
+int of_device_register(struct platform_device *pdev)
+{
+ device_initialize(&pdev->dev);
+ return of_device_add(pdev);
+}
EXPORT_SYMBOL(of_device_register);
void of_device_unregister(struct platform_device *ofdev)
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index 30726c8..5b4a07f 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -587,20 +587,23 @@ struct platform_device *of_device_alloc(struct device_node *np,
int rc, i, num_reg = 0, num_irq;
struct resource *res, temp_res;
- /* First count how many resources are needed */
+ dev = platform_device_alloc("", -1);
+ if (!dev)
+ return NULL;
+
+ /* count the io and irq resources */
while (of_address_to_resource(np, num_reg, &temp_res) == 0)
num_reg++;
num_irq = of_irq_count(np);
- /* Allocate memory for both the struct device and the resource table */
- dev = kzalloc(sizeof(*dev) + (sizeof(*res) * (num_reg + num_irq)),
- GFP_KERNEL);
- if (!dev)
- return NULL;
- res = (struct resource *) &dev[1];
-
/* Populate the resource table */
if (num_irq || num_reg) {
+ res = kzalloc(sizeof(*res) * (num_irq + num_reg), GFP_KERNEL);
+ if (!res) {
+ platform_device_put(dev);
+ return NULL;
+ }
+
dev->num_resources = num_reg + num_irq;
dev->resource = res;
for (i = 0; i < num_reg; i++, res++) {
@@ -615,7 +618,6 @@ struct platform_device *of_device_alloc(struct device_node *np,
dev->dev.dma_mask = &dev->archdata.dma_mask;
#endif
dev->dev.parent = parent;
- dev->dev.release = of_release_dev;
if (bus_id)
dev_set_name(&dev->dev, "%s", bus_id);
@@ -653,8 +655,8 @@ struct platform_device *of_platform_device_create(struct device_node *np,
* to do such, possibly using a device notifier
*/
- if (of_device_register(dev) != 0) {
- of_device_free(dev);
+ if (of_device_add(dev) != 0) {
+ platform_device_put(dev);
return NULL;
}