From fc014095da23575297288bb3ab215db7c50af381 Mon Sep 17 00:00:00 2001 From: Peter Ujfalusi Date: Wed, 14 Oct 2015 14:42:59 +0300 Subject: [PATCH] dmaengine: edma: Print warning when linking slots from different eDMA Warning message in case of linking between paRAM slots in different eDMA controllers. Signed-off-by: Peter Ujfalusi Signed-off-by: Vinod Koul --- drivers/dma/edma.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c index f6653da0ee16..d33ae0b43925 100644 --- a/drivers/dma/edma.c +++ b/drivers/dma/edma.c @@ -619,6 +619,9 @@ static void edma_free_slot(struct edma_cc *ecc, unsigned slot) */ static void edma_link(struct edma_cc *ecc, unsigned from, unsigned to) { + if (unlikely(EDMA_CTLR(from) != EDMA_CTLR(to))) + dev_warn(ecc->dev, "Ignoring eDMA instance for linking\n"); + from = EDMA_CHAN_SLOT(from); to = EDMA_CHAN_SLOT(to); if (from >= ecc->num_slots || to >= ecc->num_slots)