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dmaengine: xilinx_dma: Print debug message when no free tx segments

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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>
This commit is contained in:
Nicholas Graumann 2019-10-15 20:18:23 +05:30 committed by Vinod Koul
parent d8bae21a48
commit 722b9e6d7e
1 changed files with 3 additions and 0 deletions
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3
drivers/dma/xilinx/xilinx_dma.c
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@ -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;
}