x86: unify dma_mapping_error

We provide a map_error function in pci-base_32.c to make
sure i386 keeps with the same behaviour it used to.

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

1 files changed, 7 insertions, 0 deletions

diff --git a/arch/x86/kernel/pci-base_32.c b/arch/x86/kernel/pci-base_32.c
index cf4bb28dfc6a..7caf5c211f23 100644
--- a/arch/x86/kernel/pci-base_32.c
+++ b/arch/x86/kernel/pci-base_32.c
@@ -30,6 +30,12 @@ static int pci32_dma_map_sg(struct device *dev, struct scatterlist *sglist,
         return nents;
 }
 
+/* Make sure we keep the same behaviour */
+static int pci32_map_error(dma_addr_t dma_addr)
+{
+        return 0;
+}
+
 static const struct dma_mapping_ops pci32_dma_ops = {
         .map_single = pci32_map_single,
         .unmap_single = NULL,
@@ -41,6 +47,7 @@ static const struct dma_mapping_ops pci32_dma_ops = {
         .sync_single_range_for_device = NULL,
         .sync_sg_for_cpu = NULL,
         .sync_sg_for_device = NULL,
+        .mapping_error = pci32_map_error,
 };
 
 const struct dma_mapping_ops *dma_ops = &pci32_dma_ops;