diff options
| author | Nicholas Graumann <nick.graumann@gmail.com> | 2019-10-15 20:18:23 +0530 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2019-10-20 19:35:27 +0530 |
| commit | 722b9e6d7e49b1dc429f9b65680b325c1ce9a763 (patch) | |
| tree | 288f6c049f3d18e418ff3faf4751f0e4ab19a1ed /drivers/dma | |
| parent | d8bae21a48dbe132788291257638f323f4ee5c94 (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.c | 3 |
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; } |