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authorSanjay R Mehta <sanju.mehta@amd.com>2020-05-05 23:21:52 -0500
committerJon Mason <jdmason@kudzu.us>2020-06-05 20:02:08 -0400
commit9cb8bfdf5262b14d29617d1595b79e1f360135ab (patch)
tree7efa13131b751ad157fad3bc3a0bea35a4f56dc0 /drivers/ntb
parentd7699665773b6afc14d4eef82bb3ef50467a9353 (diff)
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.c11
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);