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Groups > linux.kernel > #1230022

[PATCH v3 17/24] dmaengine: edma: Print warning when linking slots from different eDMA

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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

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[PATCH v3 00/24] dmaengine/ARM: Merge the edma drivers into one Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-09-22 12:00 +0200
  [PATCH v3 13/24] dmaengine: edma: Use devm_kcalloc when possible Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-09-22 12:00 +0200
  [PATCH v3 04/24] ARM: davinci/common: Convert edma driver to handle one eDMA instance per driver Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-09-22 12:00 +0200
  [PATCH v3 03/24] dmaengine: edma: Simplify and optimize the edma_execute path Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-09-22 12:00 +0200
  [PATCH v3 21/24] dmaengine: edma: Simplify and optimize ccerr interrupt handler Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-09-22 12:00 +0200
  [PATCH v3 06/24] ARM: common: edma: Internal API to use pointer to 'struct edma' Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-09-22 12:00 +0200
  [PATCH v3 18/24] dmaengine: edma: Consolidate the comments for functions Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-09-22 12:00 +0200
  [PATCH v3 17/24] dmaengine: edma: Print warning when linking slots from different eDMA Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-09-22 12:00 +0200
  [PATCH v3 20/24] dmaengine: edma: Move the pending error check into helper function Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-09-22 12:00 +0200
  [PATCH v3 15/24] dmaengine: edma: Use dev_dbg instead pr_debug Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-09-22 12:00 +0200
  [PATCH v3 23/24] dmaengine: edma: Rename bitfields for slot and channel usage tracking Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-09-22 12:00 +0200
  [PATCH v3 24/24] dmaengine: edma: Dynamic paRAM slot handling if HW supports it Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-09-22 12:00 +0200
  [PATCH v3 19/24] dmaengine: edma: Simplify the interrupt handling Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-09-22 12:00 +0200
  [PATCH v3 22/24] dmaengine: edma: Read channel mapping support only once from HW Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-09-22 12:00 +0200
  [PATCH v3 07/24] ARM/dmaengine: edma: Public API to use private struct pointer Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-09-22 12:00 +0200
  [PATCH v3 02/24] ARM: common: edma: Remove unused functions Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-09-22 12:10 +0200
  [PATCH v3 09/24] ARM: davinci: Use platform_device_register_full() to create pdev for eDMA Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-09-22 12:10 +0200
  [PATCH v3 01/24] ARM: common: edma: Fix channel parameter for irq callbacks Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-09-22 12:10 +0200
  [PATCH v3 11/24] dmaengine: edma: Allocate memory dynamically for bitmaps and structures Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-09-22 12:10 +0200
  [PATCH v3 12/24] dmaengine: edma: Parameter alignment and long line fixes Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-09-22 12:10 +0200
  [PATCH v3 05/24] ARM/dmaengine: edma: Move of_dma_controller_register to the dmaengine driver Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-09-22 12:10 +0200
  Re: [PATCH v3 10/24] ARM: davinci: Add set dma_mask to eDMA devices Tony Lindgren <tony@atomide.com> - 2015-09-23 19:30 +0200
    Re: [PATCH v3 10/24] ARM: davinci: Add set dma_mask to eDMA devices Peter Ujfalusi <peter.ujfalusi@ti.com> - 2015-09-24 12:00 +0200

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