dmaengine: xilinx: dpdma: Print channel number in kernel log messages

To ease debugging, add the channel number to all kernel log messages
related to a particular channel.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Jianqiang Chen <jianqiang.chen@xilinx.com>
Reviewed-by: Jianqiang Chen <jianqiang.chen@xilinx.com>
Link: https://lore.kernel.org/r/20210520152420.23986-3-laurent.pinchart@ideasonboard.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/xilinx/xilinx_dpdma.c b/drivers/dma/xilinx/xilinx_dpdma.c
index 70b29bd..ea56c3b 100644 (file)
--- a/drivers/dma/xilinx/xilinx_dpdma.c
+++ b/drivers/dma/xilinx/xilinx_dpdma.c
@@ -702,8 +702,9 @@ xilinx_dpdma_chan_prep_interleaved_dma(struct xilinx_dpdma_chan *chan,
        size_t stride = hsize + xt->sgl[0].icg;
 
        if (!IS_ALIGNED(xt->src_start, XILINX_DPDMA_ALIGN_BYTES)) {
-               dev_err(chan->xdev->dev, "buffer should be aligned at %d B\n",
-                       XILINX_DPDMA_ALIGN_BYTES);
+               dev_err(chan->xdev->dev,
+                       "chan%u: buffer should be aligned at %d B\n",
+                       chan->id, XILINX_DPDMA_ALIGN_BYTES);
                return NULL;
        }
 
@@ -934,7 +935,9 @@ static int xilinx_dpdma_chan_notify_no_ostand(struct xilinx_dpdma_chan *chan)
 
        cnt = xilinx_dpdma_chan_ostand(chan);
        if (cnt) {
-               dev_dbg(chan->xdev->dev, "%d outstanding transactions\n", cnt);
+               dev_dbg(chan->xdev->dev,
+                       "chan%u: %d outstanding transactions\n",
+                       chan->id, cnt);
                return -EWOULDBLOCK;
        }
 
@@ -970,8 +973,8 @@ static int xilinx_dpdma_chan_wait_no_ostand(struct xilinx_dpdma_chan *chan)
                return 0;
        }
 
-       dev_err(chan->xdev->dev, "not ready to stop: %d trans\n",
-               xilinx_dpdma_chan_ostand(chan));
+       dev_err(chan->xdev->dev, "chan%u: not ready to stop: %d trans\n",
+               chan->id, xilinx_dpdma_chan_ostand(chan));
 
        if (ret == 0)
                return -ETIMEDOUT;
@@ -1005,8 +1008,8 @@ static int xilinx_dpdma_chan_poll_no_ostand(struct xilinx_dpdma_chan *chan)
                return 0;
        }
 
-       dev_err(chan->xdev->dev, "not ready to stop: %d trans\n",
-               xilinx_dpdma_chan_ostand(chan));
+       dev_err(chan->xdev->dev, "chan%u: not ready to stop: %d trans\n",
+               chan->id, xilinx_dpdma_chan_ostand(chan));
 
        return -ETIMEDOUT;
 }
@@ -1060,7 +1063,8 @@ static void xilinx_dpdma_chan_done_irq(struct xilinx_dpdma_chan *chan)
                vchan_cyclic_callback(&active->vdesc);
        else
                dev_warn(chan->xdev->dev,
-                        "DONE IRQ with no active descriptor!\n");
+                        "chan%u: DONE IRQ with no active descriptor!\n",
+                        chan->id);
 
        spin_unlock_irqrestore(&chan->lock, flags);
 }
@@ -1148,10 +1152,12 @@ static void xilinx_dpdma_chan_handle_err(struct xilinx_dpdma_chan *chan)
 
        spin_lock_irqsave(&chan->lock, flags);
 
-       dev_dbg(xdev->dev, "cur desc addr = 0x%04x%08x\n",
+       dev_dbg(xdev->dev, "chan%u: cur desc addr = 0x%04x%08x\n",
+               chan->id,
                dpdma_read(chan->reg, XILINX_DPDMA_CH_DESC_START_ADDRE),
                dpdma_read(chan->reg, XILINX_DPDMA_CH_DESC_START_ADDR));
-       dev_dbg(xdev->dev, "cur payload addr = 0x%04x%08x\n",
+       dev_dbg(xdev->dev, "chan%u: cur payload addr = 0x%04x%08x\n",
+               chan->id,
                dpdma_read(chan->reg, XILINX_DPDMA_CH_PYLD_CUR_ADDRE),
                dpdma_read(chan->reg, XILINX_DPDMA_CH_PYLD_CUR_ADDR));
 
@@ -1167,7 +1173,8 @@ static void xilinx_dpdma_chan_handle_err(struct xilinx_dpdma_chan *chan)
        xilinx_dpdma_chan_dump_tx_desc(chan, active);
 
        if (active->error)
-               dev_dbg(xdev->dev, "repeated error on desc\n");
+               dev_dbg(xdev->dev, "chan%u: repeated error on desc\n",
+                       chan->id);
 
        /* Reschedule if there's no new descriptor */
        if (!chan->desc.pending &&
@@ -1232,7 +1239,8 @@ static int xilinx_dpdma_alloc_chan_resources(struct dma_chan *dchan)
                                          align, 0);
        if (!chan->desc_pool) {
                dev_err(chan->xdev->dev,
-                       "failed to allocate a descriptor pool\n");
+                       "chan%u: failed to allocate a descriptor pool\n",
+                       chan->id);
                return -ENOMEM;
        }