x86: adjust dma_free_coherent for i386

We call unmap_single, if available.

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, 2 insertions, 0 deletions

diff --git a/arch/x86/kernel/pci-dma_32.c b/arch/x86/kernel/pci-dma_32.c
index 9199bccb9214..5ae3470113c6 100644
--- a/arch/x86/kernel/pci-dma_32.c
+++ b/arch/x86/kernel/pci-dma_32.c
@@ -80,6 +80,8 @@ void dma_free_coherent(struct device *dev, size_t size,
         WARN_ON(irqs_disabled());       /* for portability */
         if (dma_release_coherent(dev, order, vaddr))
                 return;
+        if (dma_ops->unmap_single)
+                dma_ops->unmap_single(dev, dma_handle, size, 0);
         free_pages((unsigned long)vaddr, order);
 }
 EXPORT_SYMBOL(dma_free_coherent);