Messages in this thread Patch in this message | | | From | Tomeu Vizoso <> | Subject | [RFC PATCH 03/16] Add DEVM_ALLOC() | Date | Tue, 21 Jul 2015 15:50:45 +0200 |
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Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com> ---
drivers/base/devres.c | 30 ++++++++++++++++++++++++++++++ include/linux/device.h | 6 ++++++ 2 files changed, 36 insertions(+)
diff --git a/drivers/base/devres.c b/drivers/base/devres.c index 0c6252921fd1..5198ccd28123 100644 --- a/drivers/base/devres.c +++ b/drivers/base/devres.c @@ -1004,3 +1004,33 @@ int devm_acquire_resources(struct device *dev) return ret; } + +/* + * this must be the called before any of the others, or not at + * all, if dev_set_drvdata() has already been called. + */ +static void devm_resource_alloc_release(struct device *dev, void *res) +{ + dev_set_drvdata(dev, NULL); +} + +int devm_resource_alloc(struct device *dev, + const struct devm_resource *resource) +{ + struct devres *dr; + + if (dev_get_drvdata(dev)) + return -EBUSY; + + dr = alloc_dr(devm_resource_alloc_release, resource->offset, + GFP_KERNEL | __GFP_ZERO); + if (unlikely(!dr)) + return -ENOMEM; + + dev_set_drvdata(dev, dr->data); + set_node_dbginfo(&dr->node, "devm_resource_alloc", resource->offset); + devres_add(dev, dr->data); + + return 0; +} +EXPORT_SYMBOL_GPL(devm_resource_alloc); diff --git a/include/linux/device.h b/include/linux/device.h index a1c3829152a1..c2bbee6b60ad 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -681,6 +681,12 @@ extern void devm_free_pages(struct device *dev, unsigned long addr); extern int devm_acquire_resources(struct device *dev); +extern int devm_resource_alloc(struct device *dev, + const struct devm_resource *resource); + +#define DEVM_ALLOC(_struct) \ + { .initfunc = devm_resource_alloc, .offset = sizeof(struct _struct), } + void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res); /* allows to add/remove a custom action to devres stack */ -- 2.4.3
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