Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1231996

[PATCH v4 18/25] dmaengine: edma: Print warning when linking slots from different eDMA

Show all headers | View raw

Warning message in case of linking between paRAM slots in different eDMA
controllers.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
---
 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

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next | Find similar | Unroll thread

Thread

[PATCH v4 18/25] dmaengine: edma: Print warning when linking slots from different eDMA Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-09-24 12:10 +0200

csiph-web