From 3f06f536fa841f83faf4bf5346fea3dfae0c0a04 Mon Sep 17 00:00:00 2001 From: Jake Oshins Date: Tue, 5 Apr 2016 10:22:51 -0700 Subject: [PATCH] drivers:hv: Make a function to free mmio regions through vmbus 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 Signed-off-by: K. Y. Srinivasan Signed-off-by: Greg Kroah-Hartman Orabug: 25507635 (cherry picked from commit 97fb77dc87582300fa3c141b63699f853576cab1) Signed-off-by: Jack Vogel Signed-off-by: Dhaval Giani --- drivers/hv/vmbus_drv.c | 15 +++++++++++++++ include/linux/hyperv.h | 2 +- 2 files changed, 16 insertions(+), 1 deletion(-) diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index 77ee76f6799c..f84fae0780e2 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -1191,6 +1191,21 @@ int vmbus_allocate_mmio(struct resource **new, struct hv_device *device_obj, } 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. * @cpu_number: CPU number in Linux terms diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index e5cdef430880..64cc296dd1ee 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -998,7 +998,7 @@ int vmbus_allocate_mmio(struct resource **new, struct hv_device *device_obj, resource_size_t min, resource_size_t max, resource_size_t size, resource_size_t align, 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); /** -- 2.50.1