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Commit de581b65 authored by Dan Williams's avatar Dan Williams
Browse files

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: default avatarDan Williams <dan.j.williams@intel.com>
parent 6f82b83b

drivers/dma/ioat/dma_v3.c

+17 −5
Original line number Diff line number Diff line
@@ -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);