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| author | Anup Patel <anup.patel@broadcom.com> | 2017-05-15 07:04:53 +0200 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2017-05-16 06:31:57 +0200 |
| commit | baae03a0e2497f49704628fd0aaf993cf98e1b99 (patch) | |
| tree | 103de8b8d9fd6b712a7cb4729660225541ad4269 /crypto/async_tx | |
| parent | lib/raid6: Add log-of-2 table for RAID6 HW requiring disk position (diff) | |
| download | linux-baae03a0e2497f49704628fd0aaf993cf98e1b99.tar.xz linux-baae03a0e2497f49704628fd0aaf993cf98e1b99.zip | |
async_tx: Fix DMA_PREP_FENCE usage in do_async_gen_syndrome()
The DMA_PREP_FENCE is to be used when preparing Tx descriptor if output
of Tx descriptor is to be used by next/dependent Tx descriptor.
The DMA_PREP_FENSE will not be set correctly in do_async_gen_syndrome()
when calling dma->device_prep_dma_pq() under following conditions:
1. ASYNC_TX_FENCE not set in submit->flags
2. DMA_PREP_FENCE not set in dma_flags
3. src_cnt (= (disks - 2)) is greater than dma_maxpq(dma, dma_flags)
This patch fixes DMA_PREP_FENCE usage in do_async_gen_syndrome() taking
inspiration from do_async_xor() implementation.
Signed-off-by: Anup Patel <anup.patel@broadcom.com>
Reviewed-by: Ray Jui <ray.jui@broadcom.com>
Reviewed-by: Scott Branden <scott.branden@broadcom.com>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'crypto/async_tx')
| -rw-r--r-- | crypto/async_tx/async_pq.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/crypto/async_tx/async_pq.c b/crypto/async_tx/async_pq.c index f83de99d7d71..56bd612927ab 100644 --- a/crypto/async_tx/async_pq.c +++ b/crypto/async_tx/async_pq.c @@ -62,9 +62,6 @@ do_async_gen_syndrome(struct dma_chan *chan, dma_addr_t dma_dest[2]; int src_off = 0; - if (submit->flags & ASYNC_TX_FENCE) - dma_flags |= DMA_PREP_FENCE; - while (src_cnt > 0) { submit->flags = flags_orig; pq_src_cnt = min(src_cnt, dma_maxpq(dma, dma_flags)); @@ -83,6 +80,8 @@ do_async_gen_syndrome(struct dma_chan *chan, if (cb_fn_orig) dma_flags |= DMA_PREP_INTERRUPT; } + if (submit->flags & ASYNC_TX_FENCE) + dma_flags |= DMA_PREP_FENCE; /* Drivers force forward progress in case they can not provide * a descriptor |