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linux/drivers/dma/qcom
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Shunyong Yang 875aac8a46 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>
2019-01-20 10:43:34 +05:30
..
bam_dma.c dmaengine: qcom: bam_dma: use struct_size() in kzalloc() 2019-01-07 18:07:21 +05:30
hidma.c dmaengine: qcom_hidma: initialize tx flags in hidma_prep_dma_* 2019-01-20 10:43:34 +05:30
hidma.h dmaengine: qcom_hidma: introduce memset support 2017-07-19 09:33:21 +05:30
hidma_dbg.c dmaengine: qcom_hidma: convert to DEFINE_SHOW_ATTRIBUTE 2018-12-17 11:49:41 +05:30
hidma_ll.c dmaengine: qcom_hidma: check pending interrupts 2017-12-12 11:02:43 +05:30
hidma_mgmt.c dmaengine: qcom_hidma: Check for driver register failure 2019-01-07 09:50:39 +05:30
hidma_mgmt.h
hidma_mgmt_sys.c dmaengine: qcom: simplify getting .drvdata 2018-04-22 11:48:44 +05:30
Kconfig
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00