Commit 9f9ab46d authored Apr 08, 2008 by Glauber Costa Committed by Ingo Molnar Apr 19, 2008

x86: implement mapping_error in pci-nommu_64.c



This patch implements mapping_error for pci-nommu_64.c.
It takes care to keep the same compatible behaviour it already
had. Although this file is not (yet) used for i386, we introduce
the i386 version here. Again, care is taken, even at the expense of
an ifdef, to keep the same behaviour inconditionally.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

parent d5df63f4

arch/x86/kernel/pci-nommu_64.c

+12 −0

Original line number	Diff line number	Diff line
		@@ -67,9 +67,21 @@ static int nommu_map_sg(struct device hwdev, struct scatterlist sg,
		return nents;
		}

		/* Make sure we keep the same behaviour */
		static int nommu_mapping_error(dma_addr_t dma_addr)
		{
		#ifdef CONFIG_X86_32
		return 0;
		#else
		return (dma_addr == bad_dma_address);
		#endif
		}


		const struct dma_mapping_ops nommu_dma_ops = {
		.map_single = nommu_map_single,
		.map_sg = nommu_map_sg,
		.mapping_error = nommu_mapping_error,
		.is_phys = 1,
		};