diff options
| author | Sanjay R Mehta <sanju.mehta@amd.com> | 2020-05-05 23:21:52 -0500 |
|---|---|---|
| committer | Jon Mason <jdmason@kudzu.us> | 2020-06-05 20:02:08 -0400 |
| commit | 9cb8bfdf5262b14d29617d1595b79e1f360135ab (patch) | |
| tree | 7efa13131b751ad157fad3bc3a0bea35a4f56dc0 /drivers/ntb | |
| parent | d7699665773b6afc14d4eef82bb3ef50467a9353 (diff) | |
| download | lwn-9cb8bfdf5262b14d29617d1595b79e1f360135ab.tar.gz lwn-9cb8bfdf5262b14d29617d1595b79e1f360135ab.zip | |
ntb_perf: avoid false dma unmap of destination address
The DMA map and unmap of destination address is already being
done in perf_init_test() and perf_clear_test() functions.
Hence avoiding it by making necessary changes in perf_copy_chunk()
function.
Signed-off-by: Sanjay R Mehta <sanju.mehta@amd.com>
Signed-off-by: Arindam Nath <arindam.nath@amd.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Diffstat (limited to 'drivers/ntb')
| -rw-r--r-- | drivers/ntb/test/ntb_perf.c | 11 |
1 files changed, 2 insertions, 9 deletions
diff --git a/drivers/ntb/test/ntb_perf.c b/drivers/ntb/test/ntb_perf.c index f159e2fa5be9..42b8a8dea2b3 100644 --- a/drivers/ntb/test/ntb_perf.c +++ b/drivers/ntb/test/ntb_perf.c @@ -804,7 +804,7 @@ static int perf_copy_chunk(struct perf_thread *pthr, dst_vaddr = dst; dst_dma_addr = peer->dma_dst_addr + (dst_vaddr - vbase); - unmap = dmaengine_get_unmap_data(dma_dev, 2, GFP_NOWAIT); + unmap = dmaengine_get_unmap_data(dma_dev, 1, GFP_NOWAIT); if (!unmap) return -ENOMEM; @@ -817,15 +817,8 @@ static int perf_copy_chunk(struct perf_thread *pthr, } unmap->to_cnt = 1; - unmap->addr[1] = dst_dma_addr; - if (dma_mapping_error(dma_dev, unmap->addr[1])) { - ret = -EIO; - goto err_free_resource; - } - unmap->from_cnt = 1; - do { - tx = dmaengine_prep_dma_memcpy(pthr->dma_chan, unmap->addr[1], + tx = dmaengine_prep_dma_memcpy(pthr->dma_chan, dst_dma_addr, unmap->addr[0], len, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); if (!tx) msleep(DMA_MDELAY); |