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[SPARC64]: Temporarily remove IOMMU merging code.

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Changeset fde6a3c82d ("iommu sg merging:
sparc64: make iommu respect the segment size limits") broke sparc64
because whilst it added the segment limiting code to the first pass of
SG mapping (in prepare_sg()) it did not add matching code to the
second pass handling (in fill_sg())

As a result the two passes disagree where the segment boundaries
should be, resulting in OOPSes, DMA corruption, and corrupted
superblocks.

Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
David S. Miller 2008-02-06 03:50:26 -08:00 • committed by David S. Miller
commit 38192d52f1
6 changed files with 93 additions and 497 deletions
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2
include/asm-sparc64/io.h
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@ -16,7 +16,7 @@
/* BIO layer definitions. */
extern unsigned long kern_base, kern_size;
#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
#define BIO_VMERGE_BOUNDARY 8192
#define BIO_VMERGE_BOUNDARY 0
static inline u8 _inb(unsigned long addr)
{