__RELEASE_REGION(9) Hardware Interfaces __RELEASE_REGION(9)NAME
__release_region - release a previously reserved resource region
void __release_region(struct resource * parent, resource_size_t start, resource_size_t n);
parent resource descriptor
resource start address
resource region size
The described resource region must match a currently busy region.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 __RELEASE_REGION(9)
Check Out this Related Man Page
BUS_ADJUST_RESOURCE(9) BSD Kernel Developer's Manual BUS_ADJUST_RESOURCE(9)NAME
bus_adjust_resource -- adjust resource allocated from a parent bus
bus_adjust_resource(device_t dev, int type, struct resource *r, u_long start, u_long end);
This function is used to ask the parent bus to adjust the resource range assigned to an allocated resource. The resource r should have been
allocated by a previous call to bus_alloc_resource(9). The new resource range must overlap the existing range of r. The type argument
should match the type argument passed to bus_alloc_resource(9) when the resource was initially allocated.
Note that none of the constraints of the original allocation request such as alignment or boundary restrictions are checked by
bus_adjust_resource(). It is the caller's responsibility to enforce any such requirements.
The bus_adjust_resource() method returns zero on success or an error code on failure.
Grow an existing memory resource by 4096 bytes.
struct resource *res;
error = bus_adjust_resource(dev, SYS_RES_MEMORY, res,
rman_get_start(res), rman_get_end(res) + 0x1000);
bus_adjust_resource() will fail if:
[EINVAL] The dev device does not have a parent device.
[EINVAL] The r resource is a shared resource.
[EINVAL] The new address range does not overlap with the existing address range of r.
[EBUSY] The new address range conflicts with another allocated resource.
SEE ALSO bus_alloc_resource(9), bus_release_resource(9), device(9), driver(9)BSD April 29, 2011 BSD
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