user/sven/linux.git/drivers/dma/qcom, branch v4.9.28

dmaengine: qcom_hidma: add error reporting for tx_status

2016-08-31T15:57:32Z

The HIDMA driver is capable of error detection. However, the error was not being passed back to the client when tx_status API is called. Changing the error handling behavior to follow this oder. 1. dmaengine asserts error interrupt 2. Driver receives and mark's the txn as error 3. Driver completes the txn and intimates the client. No further submissions. Drop the locks before calling callback, as subsequent processing by client maybe in callback thread. 4. Client invokes status and you can return error 5. On error, client calls terminate_all. You can reset channel, free all descriptors in the active, pending and completed lists 6. Client prepares new txn and so on. As part of this work, got rid of the reset in the interrupt handler when an error happens and the HW is put into disabled state. The only way to recover is for the client to terminate the channel. Signed-off-by: Sinan Kaya Signed-off-by: Vinod Koul

dmaengine: qcom_hidma: report transfer errors with new interface

2016-08-31T15:57:32Z

Pass the DMA errors to the client by passing a result argument. The HW only supports a generic error when something goes wrong. That's why, using DMA_TRANS_ABORTED all the time. Signed-off-by: Sinan Kaya Signed-off-by: Vinod Koul

dmaengine: qcom_hidma: release the descriptor before the callback

2016-08-31T15:57:32Z

There is a race condition between data transfer callback and descriptor free code. The callback routine may decide to clear the resources even though the descriptor has not yet been freed. Instead of calling the callback first and then releasing the memory, this code is changing the order to return the descriptor back to the free pool and then call the user provided callback. Signed-off-by: Sinan Kaya Signed-off-by: Vinod Koul

dmaengine: qcom_hidma: convert callback to helper function

2016-08-08T02:41:41Z

This is in preperation of moving to a callback that provides results to the callback for the transaction. The conversion will maintain current behavior and the driver must convert to new callback mechanism at a later time in order to receive results. Signed-off-by: Dave Jiang Reviewed-by: Lars-Peter Clausen Acked-by: Sinan Kaya Signed-off-by: Vinod Koul

Merge branch 'topic/dmaengine_cleanups' into for-linus

2016-07-28T04:40:37Z

dmaengine: qcom_hidma: use for_each_matching_node() macro

2016-07-24T06:16:05Z

Use for_each_matching_node() macro instead of open coding it. Signed-off-by: Wei Yongjun Acked-by: Sinan Kaya Signed-off-by: Vinod Koul

dmaengine: qcom_hidma_lli: kill the tasklets upon exit

2016-07-23T10:37:27Z

drivers should ensure that tasklets are killed, so that they can't be run after driver remove is executed Signed-off-by: Vinod Koul Cc: Sinan Kaya

dmaengine: qcom_hidma: kill the tasklets upon exit

2016-07-23T10:37:25Z

drivers should ensure that tasklets are killed, so that they can't be run after driver remove is executed Signed-off-by: Vinod Koul Acked-by: Sinan Kaya

Merge branch 'topic/bam' into for-linus

2016-07-16T14:39:34Z

dmaengine: qcom_hidma: fix return value check in hidma_mgmt_of_populate_channels()

2016-07-12T04:44:41Z

In case of error, the function platform_device_register_full() returns ERR_PTR() and never returns NULL. The NULL test in the return value check should be replaced with IS_ERR(). Signed-off-by: Wei Yongjun Signed-off-by: Vinod Koul