From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Ujfalusi Subject: [PATCH v4 18/25] dmaengine: edma: Print warning when linking slots from different eDMA Date: Thu, 24 Sep 2015 13:02:05 +0300 Message-ID: <1443088932-21731-19-git-send-email-peter.ujfalusi@ti.com> References: <1443088932-21731-1-git-send-email-peter.ujfalusi@ti.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1443088932-21731-1-git-send-email-peter.ujfalusi@ti.com> Sender: linux-kernel-owner@vger.kernel.org To: vinod.koul@intel.com, nsekhar@ti.com, linux@arm.linux.org.uk Cc: olof@lixom.net, arnd@arndb.de, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, dmaengine@vger.kernel.org List-Id: linux-omap@vger.kernel.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 d759abc80bef..b0102984e98d 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) -- 2.5.2