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resources: Add device-managed request/release_resource()

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Provide device-managed implementations of the request_resource() and
release_resource() functions.  Upon failure to request a resource, the new
devm_request_resource() function will output an error message for
consistent error reporting.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Thierry Reding
2014-08-01 14:15:10 +02:00
committed by Bjorn Helgaas
parent 52addcf9d6
commit 8d38821cbc
3 changed files with 77 additions and 0 deletions
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5
include/linux/ioport.h
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@@ -215,6 +215,11 @@ static inline int __deprecated check_region(resource_size_t s,
/* Wrappers for managed devices */
struct device;
extern int devm_request_resource(struct device *dev, struct resource *root,
struct resource *new);
extern void devm_release_resource(struct device *dev, struct resource *new);
#define devm_request_region(dev,start,n,name) \
__devm_request_region(dev, &ioport_resource, (start), (n), (name))
#define devm_request_mem_region(dev,start,n,name) \