From: Shunyong Yang shunyong.yang@hxt-semitech.com
[ 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 --- drivers/dma/qcom/hidma.c | 2 ++ 1 file changed, 2 insertions(+)
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);