Only call kmap_atomic_primary when the SG entry is mapped into
kernel virtual space.

XXX: the code already looks odd due to the lack of pairing between
kmap_atomic_primary and kunmap_atomic_primary.  Does it work either
before or after this patch?

Signed-off-by: Christoph Hellwig <h...@lst.de>
---
 arch/frv/mb93090-mb00/pci-dma.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/frv/mb93090-mb00/pci-dma.c b/arch/frv/mb93090-mb00/pci-dma.c
index 4d1f01d..77b3a1c 100644
--- a/arch/frv/mb93090-mb00/pci-dma.c
+++ b/arch/frv/mb93090-mb00/pci-dma.c
@@ -63,6 +63,9 @@ int dma_map_sg(struct device *dev, struct scatterlist 
*sglist, int nents,
        dampr2 = __get_DAMPR(2);
 
        for_each_sg(sglist, sg, nents, i) {
+               if (!sg_has_page(sg))
+                       continue;
+
                vaddr = kmap_atomic_primary(sg_page(sg));
 
                frv_dcache_writeback((unsigned long) vaddr,
-- 
1.9.1

--
To unsubscribe from this list: send the line "unsubscribe linux-metag" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Reply via email to