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Commit 0dd89119 authored by Geliang Tang's avatar Geliang Tang Committed by Greg Kroah-Hartman
Browse files

drivers: base: dma-mapping: use nth_page helper 



Use nth_page() helper instead of page_to_pfn() and pfn_to_page() to
simplify the code.

Signed-off-by: default avatarGeliang Tang <geliangtang@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent a2b60670

drivers/base/dma-mapping.c

+2 −3
Original line number Diff line number Diff line
@@ -309,14 +309,13 @@ void *dma_common_contiguous_remap(struct page *page, size_t size, 
	int i;

	struct page **pages;

	void *ptr;

	unsigned long pfn;



	pages = kmalloc(sizeof(struct page *) << get_order(size), GFP_KERNEL);

	if (!pages)

		return NULL;



	for (i = 0, pfn = page_to_pfn(page); i < (size >> PAGE_SHIFT); i++)

		pages[i] = pfn_to_page(pfn + i);

	for (i = 0; i < (size >> PAGE_SHIFT); i++)

		pages[i] = nth_page(page, i);



	ptr = dma_common_pages_remap(pages, size, vm_flags, prot, caller);