From mboxrd@z Thu Jan 1 00:00:00 1970 From: peter.ujfalusi@ti.com (Peter Ujfalusi) Date: Thu, 10 Sep 2015 11:37:46 +0300 Subject: [PATCH 17/21] dmaengine: edma: Print warning when linking slots from different eDMA In-Reply-To: <1441874270-2399-1-git-send-email-peter.ujfalusi@ti.com> References: <1441874270-2399-1-git-send-email-peter.ujfalusi@ti.com> Message-ID: <1441874270-2399-18-git-send-email-peter.ujfalusi@ti.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Warning message in case of linking between paRAM slots in different eDMA controllers. Signed-off-by: Peter Ujfalusi --- drivers/dma/edma.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c index e735147ccece..2c6be4c62a73 100644 --- a/drivers/dma/edma.c +++ b/drivers/dma/edma.c @@ -598,6 +598,9 @@ 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) -- 2.5.1