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dmaengine: edma: Re-evaluate errors when ccerr is triggered w/o error event
When the ccerr handler is called but the error registers indicate no error events we need to command eDMA to re-evaluate the errors. Otherwise we can receive flood of error interrupts. Reported-by: Roger Quadros <rogerq@ti.com> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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1 changed files with 10 additions and 1 deletions
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@ -1518,8 +1518,17 @@ static irqreturn_t dma_ccerr_handler(int irq, void *data)
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dev_vdbg(ecc->dev, "dma_ccerr_handler\n");
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if (!edma_error_pending(ecc))
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if (!edma_error_pending(ecc)) {
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/*
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* The registers indicate no pending error event but the irq
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* handler has been called.
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* Ask eDMA to re-evaluate the error registers.
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*/
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dev_err(ecc->dev, "%s: Error interrupt without error event!\n",
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__func__);
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edma_write(ecc, EDMA_EEVAL, 1);
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return IRQ_NONE;
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}
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while (1) {
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/* Event missed register(s) */
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