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| author | Dan Williams <dan.j.williams@intel.com> | 2009-11-20 01:08:45 +0100 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2009-11-20 01:08:45 +0100 |
| commit | de581b65f6fe78168affa552c3bd15b8c80ed614 (patch) | |
| tree | b980e64cf31ad79c489838310be2e13e626dd05c /drivers/dma | |
| parent | ioat2,3: disable asynchronous error notifications (diff) | |
| download | linux-de581b65f6fe78168affa552c3bd15b8c80ed614.tar.xz linux-de581b65f6fe78168affa552c3bd15b8c80ed614.zip | |
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>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | 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 4f305f61f878..fad2e9fba490 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); |