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Commit 5b3e5b72 authored by Glauber Costa's avatar Glauber Costa Committed by Ingo Molnar
Browse files

x86: use WARN_ON in mapping functions 



In the very same way i386 do, we use WARN_ON functions
in map_simple and map_sg.

Signed-off-by: default avatarGlauber Costa <gcosta@redhat.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 30db2cbf

arch/x86/kernel/pci-nommu_64.c

+3 −0
Original line number Diff line number Diff line
@@ -30,6 +30,7 @@ nommu_map_single(struct device *hwdev, phys_addr_t paddr, size_t size, 
	       int direction)

{

	dma_addr_t bus = paddr;

	WARN_ON(size == 0);

	if (!check_addr("map_single", hwdev, bus, size))

				return bad_dma_address;

	flush_write_buffers();
@@ -58,6 +59,8 @@ static int nommu_map_sg(struct device *hwdev, struct scatterlist *sg, 
	struct scatterlist *s;

	int i;



	WARN_ON(nents == 0 || sg[0].length == 0);



	for_each_sg(sg, s, nents, i) {

		BUG_ON(!sg_page(s));

		s->dma_address = sg_phys(s);