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| author | Grant Likely <grant.likely@secretlab.ca> | 2010-10-20 11:45:13 -0600 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2010-10-21 11:10:10 -0600 |
| commit | 7096d0422153ffcc2264eef652fc3a7bca3e6d3c (patch) | |
| tree | 2be6139f1e26acb4d0680e50a87623bc18938147 /drivers/of/platform.c | |
| parent | bda80da469a93122121de601dd469ce1aaa6effa (diff) | |
| download | linux-7096d0422153ffcc2264eef652fc3a7bca3e6d3c.tar.bz2 | |
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/platform.c')
| -rw-r--r-- | drivers/of/platform.c | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/drivers/of/platform.c b/drivers/of/platform.c index 30726c8b0693..5b4a07f1220e 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; } |