Gitweb: http://git.kernel.org/linus/de581b65f6fe78168affa552c3bd15b8c80ed614
Commit: de581b65f6fe78168affa552c3bd15b8c80ed614
Parent: 6f82b83b7a56bc6e9dd6d7b93531dde6027c5309
Author: Dan Williams <dan.j.williams@intel.com>
AuthorDate: Thu Nov 19 17:08:45 2009 -0700
Committer: Dan Williams <dan.j.williams@intel.com>
CommitDate: Thu Nov 19 17:08:45 2009 -0700
ioat3: specify valid address for disabled-Q or disabled-P
Although disabled, hardware still checks address validity, so duplicate
the known address.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
drivers/dma/ioat/dma_v3.c | 22 +++++++++++++++++-----
1 files changed, 17 insertions(+), 5 deletions(-)
diff --git a/drivers/dma/ioat/dma_v3.c b/drivers/dma/ioat/dma_v3.c
index 4f305f6..fad2e9f 100644
--- a/drivers/dma/ioat/dma_v3.c
+++ b/drivers/dma/ioat/dma_v3.c
@@ -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);
--
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