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ioat3: specify valid address for disabled-Q or disabled-P

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Although disabled, hardware still checks address validity, so duplicate
the known address.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2009-11-19 17:08:45 -07:00
parent 6f82b83b7a
commit de581b65f6
1 changed files with 17 additions and 5 deletions
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22
drivers/dma/ioat/dma_v3.c
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@ -736,10 +736,16 @@ ioat3_prep_pq(struct dma_chan *chan, dma_addr_t *dst, dma_addr_t *src,
unsigned int src_cnt, const unsigned char *scf, size_t len,
unsigned long flags)
{
/* specify valid address for disabled result */
if (flags & DMA_PREP_PQ_DISABLE_P)
dst[0] = dst[1];
if (flags & DMA_PREP_PQ_DISABLE_Q)
dst[1] = dst[0];
/* handle the single source multiply case from the raid6
* recovery path
*/
if (unlikely((flags & DMA_PREP_PQ_DISABLE_P) && src_cnt == 1)) {
if ((flags & DMA_PREP_PQ_DISABLE_P) && src_cnt == 1) {
dma_addr_t single_source[2];
unsigned char single_source_coef[2];
@ -761,6 +767,12 @@ ioat3_prep_pq_val(struct dma_chan *chan, dma_addr_t *pq, dma_addr_t *src,
unsigned int src_cnt, const unsigned char *scf, size_t len,
enum sum_check_flags *pqres, unsigned long flags)
{
/* specify valid address for disabled result */
if (flags & DMA_PREP_PQ_DISABLE_P)
pq[0] = pq[1];
if (flags & DMA_PREP_PQ_DISABLE_Q)
pq[1] = pq[0];
/* the cleanup routine only sets bits on validate failure, it
* does not clear bits on validate success... so clear it here
*/
@ -778,9 +790,9 @@ ioat3_prep_pqxor(struct dma_chan *chan, dma_addr_t dst, dma_addr_t *src,
dma_addr_t pq[2];
memset(scf, 0, src_cnt);
flags |= DMA_PREP_PQ_DISABLE_Q;
pq[0] = dst;
pq[1] = ~0;
flags |= DMA_PREP_PQ_DISABLE_Q;
pq[1] = dst; /* specify valid address for disabled result */
return __ioat3_prep_pq_lock(chan, NULL, pq, src, src_cnt, scf, len,
flags);
@ -800,9 +812,9 @@ ioat3_prep_pqxor_val(struct dma_chan *chan, dma_addr_t *src,
*result = 0;
memset(scf, 0, src_cnt);
flags |= DMA_PREP_PQ_DISABLE_Q;
pq[0] = src[0];
pq[1] = ~0;
flags |= DMA_PREP_PQ_DISABLE_Q;
pq[1] = pq[0]; /* specify valid address for disabled result */
return __ioat3_prep_pq_lock(chan, result, pq, &src[1], src_cnt - 1, scf,
len, flags);