diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2009-10-19 18:09:32 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2009-10-19 18:20:20 -0700 |
| commit | 5676470f06f783aebf545c8f17ca772911022068 (patch) | |
| tree | 58a33d5fc031fc0a6090299dd8535c24182b7897 | |
| parent | 6629542e79255e0dbef8ec82eaf644e1b2546c3c (diff) | |
async_pq: kill a stray dma_map() call and other cleanups
- update the kernel doc for async_syndrome to indicate what NULL in the
source list means
- whitespace fixups
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
| -rw-r--r-- | crypto/async_tx/async_pq.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/crypto/async_tx/async_pq.c b/crypto/async_tx/async_pq.c index 43b1436bd968..60476560e0b0 100644 --- a/crypto/async_tx/async_pq.c +++ b/crypto/async_tx/async_pq.c @@ -181,10 +181,14 @@ do_sync_gen_syndrome(struct page **blocks, unsigned int offset, int disks, * blocks[disks-1] to NULL. When P or Q is omitted 'len' must be <= * PAGE_SIZE as a temporary buffer of this size is used in the * synchronous path. 'disks' always accounts for both destination - * buffers. + * buffers. If any source buffers (blocks[i] where i < disks - 2) are + * set to NULL those buffers will be replaced with the raid6_zero_page + * in the synchronous path and omitted in the hardware-asynchronous + * path. * * 'blocks' note: if submit->scribble is NULL then the contents of - * 'blocks' may be overridden + * 'blocks' may be overwritten to perform address conversions + * (dma_map_page() or page_address()). */ struct dma_async_tx_descriptor * async_gen_syndrome(struct page **blocks, unsigned int offset, int disks, @@ -283,13 +287,13 @@ async_syndrome_val(struct page **blocks, unsigned int offset, int disks, if (!P(blocks, disks)) dma_flags |= DMA_PREP_PQ_DISABLE_P; else - pq[0] = dma_map_page(dev, P(blocks,disks), + pq[0] = dma_map_page(dev, P(blocks, disks), offset, len, DMA_TO_DEVICE); if (!Q(blocks, disks)) dma_flags |= DMA_PREP_PQ_DISABLE_Q; else - pq[1] = dma_map_page(dev, Q(blocks,disks), + pq[1] = dma_map_page(dev, Q(blocks, disks), offset, len, DMA_TO_DEVICE); @@ -303,9 +307,6 @@ async_syndrome_val(struct page **blocks, unsigned int offset, int disks, coefs[src_cnt] = raid6_gfexp[i]; src_cnt++; } - pq[1] = dma_map_page(dev, Q(blocks,disks), - offset, len, - DMA_TO_DEVICE); for (;;) { tx = device->device_prep_dma_pq_val(chan, pq, dma_src, |