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dmaengine: qcom_hidma: break completion processing on error

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We try to consume as much successful transfers as possible. Now that we
support MSI interrupts, an error interrupt might be observed by another
processor while we are finishing the successful ones.

Try to abort successful processing if this is the case.

Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Sinan Kaya 2016-10-07 01:25:14 -04:00 committed by Vinod Koul
parent d3eab504d4
commit fc737969f6
1 changed files with 7 additions and 0 deletions
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7
drivers/dma/qcom/hidma_ll.c
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@ -291,6 +291,13 @@ static int hidma_handle_tre_completion(struct hidma_lldev *lldev)
evre_write_off =
readl_relaxed(lldev->evca + HIDMA_EVCA_WRITE_PTR_REG);
num_completed++;
/*
* An error interrupt might have arrived while we are processing
* the completed interrupt.
*/
if (!hidma_ll_isenabled(lldev))
break;
}
if (num_completed) {