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https://github.com/RGBCube/serenity
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a324d4d6a3
AnonymousVMObject::create_with_physical_page(s) can't be NonnullRefPtr as it allocates internally. Fixing the API then surfaced an issue in ScatterGatherList, where the code was attempting to create an AnonymousVMObject in the constructor which will not be observable during OOM. Fix all of these issues and start propagating errors at the callers of the AnonymousVMObject and ScatterGatherList APis.
25 lines
977 B
C++
25 lines
977 B
C++
/*
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* Copyright (c) 2021, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/VM/ScatterGatherList.h>
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namespace Kernel {
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RefPtr<ScatterGatherList> ScatterGatherList::create(AsyncBlockDeviceRequest& request, NonnullRefPtrVector<PhysicalPage> allocated_pages, size_t device_block_size)
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{
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auto vm_object = AnonymousVMObject::create_with_physical_pages(allocated_pages);
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if (!vm_object)
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return {};
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return adopt_ref_if_nonnull(new ScatterGatherList(vm_object.release_nonnull(), request, device_block_size));
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}
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ScatterGatherList::ScatterGatherList(NonnullRefPtr<AnonymousVMObject> vm_object, AsyncBlockDeviceRequest& request, size_t device_block_size)
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: m_vm_object(move(vm_object))
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{
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m_dma_region = MM.allocate_kernel_region_with_vmobject(m_vm_object, page_round_up((request.block_count() * device_block_size)), "AHCI Scattered DMA", Region::Access::Read | Region::Access::Write, Region::Cacheable::Yes);
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}
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}
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