Re: [PATCH v2 1/2] dmaengine: qcom_hidma: initialize tx flags in hidma_prep_dma_*

From: Vinod Koul
Date: Sun Jan 20 2019 - 00:15:42 EST

On 07-01-19, 09:32, Shunyong Yang wrote:
> 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.

Applied both, thanks