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authorNicholas Graumann <nick.graumann@gmail.com>2019-10-15 20:18:23 +0530
committerVinod Koul <vkoul@kernel.org>2019-10-20 19:35:27 +0530
commit722b9e6d7e49b1dc429f9b65680b325c1ce9a763 (patch)
tree288f6c049f3d18e418ff3faf4751f0e4ab19a1ed /drivers/dma
parentd8bae21a48dbe132788291257638f323f4ee5c94 (diff)
dmaengine: xilinx_dma: Print debug message when no free tx segments
The driver should not run out of tx segments in normal operation. But, if the user attempts to prepare a transaction with a large sg list, the driver may not have enough free segments to accommodate the request. Log a message at the debug level to inform the user in case they are experiencing issues. Signed-off-by: Nicholas Graumann <nick.graumann@gmail.com> Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Link: https://lore.kernel.org/r/1571150904-3988-7-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/xilinx/xilinx_dma.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c
index d81f387cfcc7..93471a6199ce 100644
--- a/drivers/dma/xilinx/xilinx_dma.c
+++ b/drivers/dma/xilinx/xilinx_dma.c
@@ -612,6 +612,9 @@ xilinx_axidma_alloc_tx_segment(struct xilinx_dma_chan *chan)
}
spin_unlock_irqrestore(&chan->lock, flags);
+ if (!segment)
+ dev_dbg(chan->dev, "Could not find free tx segment\n");
+
return segment;
}