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IA64: iommu uses sg_next with an invalid sg element

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sg list elements might not be continuous.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
FUJITA Tomonori 2007-10-17 10:51:20 +02:00 committed by Jens Axboe
parent 8bf50f71cb
commit bdb02504f4
1 changed files with 2 additions and 2 deletions
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4
arch/ia64/hp/common/sba_iommu.c
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@ -1179,7 +1179,6 @@ sba_fill_pdir(
u64 *pdirp = NULL;
unsigned long dma_offset = 0;
dma_sg--;
while (nents-- > 0) {
int cnt = startsg->dma_length;
startsg->dma_length = 0;
@ -1201,7 +1200,8 @@ sba_fill_pdir(
u32 pide = startsg->dma_address & ~PIDE_FLAG;
dma_offset = (unsigned long) pide & ~iovp_mask;
startsg->dma_address = 0;
dma_sg = sg_next(dma_sg);
if (n_mappings)
dma_sg = sg_next(dma_sg);
dma_sg->dma_address = pide | ioc->ibase;
pdirp = &(ioc->pdir_base[pide >> iovp_shift]);
n_mappings++;