From 9f9ab46d557c32b9cad49c31d094d659ec3b59c0 Mon Sep 17 00:00:00 2001 From: Glauber Costa Date: Tue, 8 Apr 2008 13:20:45 -0300 Subject: [PATCH] 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 Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- arch/x86/kernel/pci-nommu_64.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/x86/kernel/pci-nommu_64.c b/arch/x86/kernel/pci-nommu_64.c index 90a7c40aa9..a4e8ccfae4 100644 --- a/arch/x86/kernel/pci-nommu_64.c +++ b/arch/x86/kernel/pci-nommu_64.c @@ -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, }; -- 2.39.5