lkml.org 
[lkml]   [2012]   [Dec]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 2/2] dma: mv_xor: do not sync the DMA buffer after being deallocated
Date
DMA_CHECK was unhappy:
mv_xor mv_xor.0: DMA-API: device driver tries to sync DMA memory it has not

Also, the xor test was causing the mv_xor_slot_cleanup() to incorrectly
dealocate the destination buffer. This is fixed as well, since the deallocation
is done in mv_xor_probe() (with correct flags) now:
mv_xor mv_xor.0: DMA-API: device driver frees DMA memory with different direction [device address=0x000000001dea4000] [size=4096 bytes] [mapped with DMA_FROM_DEVICE] [unmapped with DMA_BIDIRECTIONAL]

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
---
drivers/dma/mv_xor.c | 9 +++++++--
1 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c
index 39387df..f642d8b 100644
--- a/drivers/dma/mv_xor.c
+++ b/drivers/dma/mv_xor.c
@@ -946,7 +946,7 @@ static int mv_xor_memcpy_self_test(struct mv_xor_chan *mv_chan)
tx = mv_xor_prep_dma_memcpy(dma_chan, dest_dma, src_dma,
MV_XOR_TEST_SIZE,
DMA_COMPL_SRC_UNMAP_SINGLE |
- DMA_COMPL_DEST_UNMAP_SINGLE);
+ DMA_COMPL_SKIP_DEST_UNMAP);
cookie = mv_xor_tx_submit(tx);
mv_xor_issue_pending(dma_chan);
async_tx_ack(tx);
@@ -962,6 +962,8 @@ static int mv_xor_memcpy_self_test(struct mv_xor_chan *mv_chan)

dma_sync_single_for_cpu(dma_chan->device->dev, dest_dma,
MV_XOR_TEST_SIZE, DMA_FROM_DEVICE);
+ dma_unmap_single(dma_chan->device->dev, dest_dma, MV_XOR_TEST_SIZE,
+ DMA_FROM_DEVICE);
if (memcmp(src, dest, MV_XOR_TEST_SIZE)) {
dev_err(dma_chan->device->dev,
"Self-test copy failed compare, disabling\n");
@@ -1039,7 +1041,8 @@ mv_xor_xor_self_test(struct mv_xor_chan *mv_chan)
0, PAGE_SIZE, DMA_TO_DEVICE);

tx = mv_xor_prep_dma_xor(dma_chan, dest_dma, dma_srcs,
- MV_XOR_NUM_SRC_TEST, PAGE_SIZE, 0);
+ MV_XOR_NUM_SRC_TEST, PAGE_SIZE,
+ DMA_COMPL_SKIP_DEST_UNMAP);

cookie = mv_xor_tx_submit(tx);
mv_xor_issue_pending(dma_chan);
@@ -1056,6 +1059,8 @@ mv_xor_xor_self_test(struct mv_xor_chan *mv_chan)

dma_sync_single_for_cpu(dma_chan->device->dev, dest_dma,
PAGE_SIZE, DMA_FROM_DEVICE);
+ dma_unmap_page(dma_chan->device->dev, dest_dma, PAGE_SIZE,
+ DMA_FROM_DEVICE);
for (i = 0; i < (PAGE_SIZE / sizeof(u32)); i++) {
u32 *ptr = page_address(dest);
if (ptr[i] != cmp_word) {
--
1.7.1


\
 
 \ /
  Last update: 2012-12-27 21:21    [W:0.106 / U:0.084 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site