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drivers:hv: Make a function to free mmio regions through vmbus

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This patch introduces a function that reverses everything
done by vmbus_allocate_mmio().  Existing code just called
release_mem_region().  Future patches in this series
require a more complex sequence of actions, so this function
is introduced to wrap those actions.

Signed-off-by: Jake Oshins <jakeo@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jake Oshins 2016-04-05 10:22:51 -07:00 committed by Greg Kroah-Hartman
parent e16dad6bfe
commit 97fb77dc87
2 changed files with 16 additions and 1 deletions
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15
drivers/hv/vmbus_drv.c
View File

@ -1187,6 +1187,21 @@ exit:
} }
EXPORT_SYMBOL_GPL(vmbus_allocate_mmio); EXPORT_SYMBOL_GPL(vmbus_allocate_mmio);
/**
* vmbus_free_mmio() - Free a memory-mapped I/O range.
* @start: Base address of region to release.
* @size: Size of the range to be allocated
*
* This function releases anything requested by
* vmbus_mmio_allocate().
*/
void vmbus_free_mmio(resource_size_t start, resource_size_t size)
{
release_mem_region(start, size);
}
EXPORT_SYMBOL_GPL(vmbus_free_mmio);
/** /**
* vmbus_cpu_number_to_vp_number() - Map CPU to VP. * vmbus_cpu_number_to_vp_number() - Map CPU to VP.
* @cpu_number: CPU number in Linux terms * @cpu_number: CPU number in Linux terms

2
include/linux/hyperv.h
View File

@ -1120,7 +1120,7 @@ int vmbus_allocate_mmio(struct resource **new, struct hv_device *device_obj,
resource_size_t min, resource_size_t max, resource_size_t min, resource_size_t max,
resource_size_t size, resource_size_t align, resource_size_t size, resource_size_t align,
bool fb_overlap_ok); bool fb_overlap_ok);
void vmbus_free_mmio(resource_size_t start, resource_size_t size);
int vmbus_cpu_number_to_vp_number(int cpu_number); int vmbus_cpu_number_to_vp_number(int cpu_number);
u64 hv_do_hypercall(u64 control, void *input, void *output); u64 hv_do_hypercall(u64 control, void *input, void *output);