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>
diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
index ee3463e..694c44e 100644
--- a/drivers/dma/edma.c
+++ b/drivers/dma/edma.c
@@ -1518,8 +1518,17 @@
dev_vdbg(ecc->dev, "dma_ccerr_handler\n");
- if (!edma_error_pending(ecc))
+ if (!edma_error_pending(ecc)) {
+ /*
+ * The registers indicate no pending error event but the irq
+ * handler has been called.
+ * Ask eDMA to re-evaluate the error registers.
+ */
+ dev_err(ecc->dev, "%s: Error interrupt without error event!\n",
+ __func__);
+ edma_write(ecc, EDMA_EEVAL, 1);
return IRQ_NONE;
+ }
while (1) {
/* Event missed register(s) */