On Wed, Sep 26, 2007 at 05:58:01PM +0900, FUJITA Tomonori wrote: > iommu code merges sg segments without considering lld's sg segment > restrictions. iommu code can't access to the limitations because they > are in request_queue. This patch adds max_segment_size to device > structure. seg_boundary_mask will be added too later. > > Signed-off-by: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx> > --- > include/linux/device.h | 7 +++++++ > 1 files changed, 7 insertions(+), 0 deletions(-) > > diff --git a/include/linux/device.h b/include/linux/device.h > index 3a38d1f..8046b60 100644 > --- a/include/linux/device.h > +++ b/include/linux/device.h > @@ -443,6 +443,13 @@ struct device { > > struct dma_coherent_mem *dma_mem; /* internal for coherent mem > override */ > + > + /* > + * a low level driver may set these to teach IOMMU code about > + * sg limitations. > + */ > + unsigned int max_segment_size; Does this really need to be here? Can't it go into the bus specific device that needs this? thanks, greg k-h - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html