| Message ID | 1439363150-8661-26-git-send-email-hch@lst.de (mailing list archive) |
|---|---|
| State | Not Applicable |
| Delegated to: | Dan Williams |
| Headers | show |
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,
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 <hch@lst.de> --- arch/frv/mb93090-mb00/pci-dma.c | 3 +++ 1 file changed, 3 insertions(+)