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| author | Shunyong Yang <shunyong.yang@hxt-semitech.com> | 2019-01-07 09:32:14 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-05 22:33:15 +0200 |
| commit | 24296fbc5445d8497382a8a802a5fa6819cbe014 (patch) | |
| tree | e705c61a293e57fa7062898212664efe84f9f8bd | |
| parent | c55f4a6e798dad7383f4e4f99d351d6016e943a2 (diff) | |
dmaengine: qcom_hidma: initialize tx flags in hidma_prep_dma_*
[ Upstream commit 875aac8a46424e5b73a9ff7f40b83311b609e407 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/dma/qcom/hidma.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/dma/qcom/hidma.c b/drivers/dma/qcom/hidma.c index ea219bca116d..411f91fde734 100644 --- a/drivers/dma/qcom/hidma.c +++ b/drivers/dma/qcom/hidma.c @@ -416,6 +416,7 @@ 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); @@ -448,6 +449,7 @@ 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); |