powerpc/dma: Fix accounting and loading large segments

When the first page of a segment fits alignment, the second likely does
not, so the DMA infrastructure (must_bounce()) thinks it needs to bounce
the pages.  Fix this by passing the previous end (address of byte
following the previous segment) as a third argument to must_bounce(), so
that the alignment check is done against the start of a new segment if
and only if necessary, instead of the current page.

Reviewed by:	adrian
Differential Revision:	https://reviews.freebsd.org/D58627

0 files changed, 0 insertions, 0 deletions