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authorShunyong Yang <shunyong.yang@hxt-semitech.com>2019-01-07 09:32:14 +0800
committerVinod Koul <vkoul@kernel.org>2019-01-20 10:43:34 +0530
commit875aac8a46424e5b73a9ff7f40b83311b609e407 (patch)
tree79e6d49561b4f5b8a8749f19204114bdfd29f27f /drivers/dma/qcom
parentedd3c389999678ddff93e72d04368ed576bf36f8 (diff)
downloadlinux-875aac8a46424e5b73a9ff7f40b83311b609e407.tar.bz2
dmaengine: qcom_hidma: initialize tx flags in hidma_prep_dma_*
In async_tx_test_ack(), it uses flags in struct dma_async_tx_descriptor to check the ACK status. As hidma reuses the descriptor in a free list when hidma_prep_dma_*(memcpy/memset) is called, the flag will keep ACKed if the descriptor has been used before. This will cause a BUG_ON in async_tx_quiesce(). kernel BUG at crypto/async_tx/async_tx.c:282! Internal error: Oops - BUG: 0 1 SMP ... task: ffff8017dd3ec000 task.stack: ffff8017dd3e8000 PC is at async_tx_quiesce+0x54/0x78 [async_tx] LR is at async_trigger_callback+0x98/0x110 [async_tx] This patch initializes flags in dma_async_tx_descriptor by the flags passed from the caller when hidma_prep_dma_*(memcpy/memset) is called. Cc: Joey Zheng <yu.zheng@hxt-semitech.com> Reviewed-by: Sinan Kaya <okaya@kernel.org> Signed-off-by: Shunyong Yang <shunyong.yang@hxt-semitech.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/qcom')
-rw-r--r--drivers/dma/qcom/hidma.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/dma/qcom/hidma.c b/drivers/dma/qcom/hidma.c
index 43d4b00b8138..9d639ed1955a 100644
--- a/drivers/dma/qcom/hidma.c
+++ b/drivers/dma/qcom/hidma.c
@@ -415,6 +415,7 @@ hidma_prep_dma_memcpy(struct dma_chan *dmach, dma_addr_t dest, dma_addr_t src,
if (!mdesc)
return NULL;
+ mdesc->desc.flags = flags;
hidma_ll_set_transfer_params(mdma->lldev, mdesc->tre_ch,
src, dest, len, flags,
HIDMA_TRE_MEMCPY);
@@ -447,6 +448,7 @@ hidma_prep_dma_memset(struct dma_chan *dmach, dma_addr_t dest, int value,
if (!mdesc)
return NULL;
+ mdesc->desc.flags = flags;
hidma_ll_set_transfer_params(mdma->lldev, mdesc->tre_ch,
value, dest, len, flags,
HIDMA_TRE_MEMSET);