[PATCH v5 0/3] dmaengine: dw-axi-dmac: Coding style cleanups

[PATCH v5 0/3] dmaengine: dw-axi-dmac: Coding style cleanups

[Khairul Anuar Romli]

This series contains a single patch that fixes minor coding style issues in
the Synopsys DesignWare AXI DMA Controller platform driver. This adjustment
possibilities were detected with the help of the analysis tool
“checkpatch.pl".

The changes are purely cosmetic:
- Adjust indentation of function arguments and debug messages
- Remove an unnecessary `return;` statement
- Add a blank line for readability between functions

These updates improve code readability and maintain consistency with
kernel coding style guidelines. No functional changes are introduced.

---
Notes:
This patch series is applied on dmaengine maintainer's tree
https://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine.git/log/?h=next

Changes in v5:
	- Refine the commit message of each patch to mention the use of
          checkpatch.pl analysis tool for the fix.
Changes in v4:
	- Improve the description on every patch.
	- Mentioned the commit the patches addressed.
Changes in v3:
	- Split into smaller patches based on warning type
Changes in v2:
	- Rebase on top of newer merge commit
v1:
https://lore.kernel.org/all/20260104093529.40913-1-karom.9560@gmail.com/
---
Khairul Anuar Romli (3):
  dmaengine: dw-axi-dmac: fix Alignment should match open parenthesis
  dmaengine: dw-axi-dmac: Add blank line after function
  dmaengine: dw-axi-dmac: Remove not useful void return function
    statements

 drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

-- 
2.43.0

[PATCH v5 1/3] dmaengine: dw-axi-dmac: fix Alignment should match open parenthesis

[Khairul Anuar Romli]

Correct alignment issue so that continuation lines properly match the
position of the opening parenthesis. This alignment issue were detected
with the help of the checkpatch.pl analysis tool with --strict --file
option.

The fix applies to code introduced in:
- 'commit 1fe20f1b8454 ("dmaengine: Introduce DW AXI DMAC driver")'
- 'commit e32634f466a9 ("dma: dw-axi-dmac: support per channel
   interrupt")'

Signed-off-by: Khairul Anuar Romli <karom.9560@gmail.com>
---
 drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
index 493c2a32b0fe..8bb97fb8fd4c 100644
--- a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
+++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
@@ -342,8 +342,8 @@ static void axi_desc_put(struct axi_dma_desc *desc)
 	kfree(desc);
 	atomic_sub(descs_put, &chan->descs_allocated);
 	dev_vdbg(chan2dev(chan), "%s: %d descs put, %d still allocated\n",
-		axi_chan_name(chan), descs_put,
-		atomic_read(&chan->descs_allocated));
+		 axi_chan_name(chan), descs_put,
+		 atomic_read(&chan->descs_allocated));
 }
 
 static void vchan_desc_put(struct virt_dma_desc *vdesc)
@@ -353,7 +353,7 @@ static void vchan_desc_put(struct virt_dma_desc *vdesc)
 
 static enum dma_status
 dma_chan_tx_status(struct dma_chan *dchan, dma_cookie_t cookie,
-		  struct dma_tx_state *txstate)
+		   struct dma_tx_state *txstate)
 {
 	struct axi_dma_chan *chan = dchan_to_axi_dma_chan(dchan);
 	struct virt_dma_desc *vdesc;
@@ -491,7 +491,7 @@ static void axi_chan_start_first_queued(struct axi_dma_chan *chan)
 
 	desc = vd_to_axi_desc(vd);
 	dev_vdbg(chan2dev(chan), "%s: started %u\n", axi_chan_name(chan),
-		vd->tx.cookie);
+		 vd->tx.cookie);
 	axi_chan_block_xfer_start(chan, desc);
 }
 
@@ -1162,7 +1162,7 @@ static irqreturn_t dw_axi_dma_interrupt(int irq, void *dev_id)
 		axi_chan_irq_clear(chan, status);
 
 		dev_vdbg(chip->dev, "%s %u IRQ status: 0x%08x\n",
-			axi_chan_name(chan), i, status);
+			 axi_chan_name(chan), i, status);
 
 		if (status & DWAXIDMAC_IRQ_ALL_ERR)
 			axi_chan_handle_err(chan, status);
@@ -1451,7 +1451,7 @@ static int axi_req_irqs(struct platform_device *pdev, struct axi_dma_chip *chip)
 		if (chip->irq[i] < 0)
 			return chip->irq[i];
 		ret = devm_request_irq(chip->dev, chip->irq[i], dw_axi_dma_interrupt,
-				IRQF_SHARED, KBUILD_MODNAME, chip);
+				       IRQF_SHARED, KBUILD_MODNAME, chip);
 		if (ret < 0)
 			return ret;
 	}
@@ -1645,7 +1645,7 @@ static void dw_remove(struct platform_device *pdev)
 	of_dma_controller_free(chip->dev->of_node);
 
 	list_for_each_entry_safe(chan, _chan, &dw->dma.channels,
-			vc.chan.device_node) {
+				 vc.chan.device_node) {
 		list_del(&chan->vc.chan.device_node);
 		tasklet_kill(&chan->vc.task);
 	}
-- 
2.43.0

[PATCH v5 2/3] dmaengine: dw-axi-dmac: Add blank line after function

[Khairul Anuar Romli]

Resolved checkpatch.pl --strict warning by inserting a blank line after
declaration.

Signed-off-by: Khairul Anuar Romli <karom.9560@gmail.com>
---
 drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
index 8bb97fb8fd4c..e59725376f8e 100644
--- a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
+++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
@@ -419,6 +419,7 @@ static void dw_axi_dma_set_byte_halfword(struct axi_dma_chan *chan, bool set)
 
 	iowrite32(val, chan->chip->apb_regs + offset);
 }
+
 /* Called in chan locked context */
 static void axi_chan_block_xfer_start(struct axi_dma_chan *chan,
 				      struct axi_dma_desc *first)
-- 
2.43.0

[PATCH v5 3/3] dmaengine: dw-axi-dmac: Remove not useful void return function statements

[Khairul Anuar Romli]

Remove an unnecessary `return` statement from a
dw_axi_dma_set_hw_channel(). This resolves a coding style issue introduced
by 'commit 32286e279385 ("dmaengine: dw-axi-dmac: Remove free slot check
algorithm in dw_axi_dma_set_hw_channel")' and ensures proper function
semantic. This unnecessary return were detected with the help of the
checkpatch.pl analysis tool with --strict --file option.

Signed-off-by: Khairul Anuar Romli <karom.9560@gmail.com>
---
 drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
index e59725376f8e..c124ac6c8df6 100644
--- a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
+++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
@@ -593,8 +593,6 @@ static void dw_axi_dma_set_hw_channel(struct axi_dma_chan *chan, bool set)
 			(chan->id * DMA_APB_HS_SEL_BIT_SIZE));
 	reg_value |= (val << (chan->id * DMA_APB_HS_SEL_BIT_SIZE));
 	lo_hi_writeq(reg_value, chip->apb_regs + DMAC_APB_HW_HS_SEL_0);
-
-	return;
 }
 
 /*
-- 
2.43.0

Re: [PATCH v5 1/3] dmaengine: dw-axi-dmac: fix Alignment should match open parenthesis

[Markus Elfring]

> Correct alignment issue so that continuation lines properly match the
> position of the opening parenthesis.

Line break?


>                                      This alignment issue were detected

                                       This issue was?


> with the help of the checkpatch.pl analysis tool with --strict --file
> option.

Would it be nicer to put such information into another paragraph?


> - 'commit 1fe20f1b8454 ("dmaengine: Introduce DW AXI DMAC driver")'
> - 'commit e32634f466a9 ("dma: dw-axi-dmac: support per channel
>    interrupt")'

Is there a need to reformat such details a bit more?


How do you think about to refine the summary phrase another bit?

Regards,
Markus

Re: [PATCH v5 3/3] dmaengine: dw-axi-dmac: Remove not useful void return function statements

[Markus Elfring]

> Remove an unnecessary `return` statement from a

Would such information be also appropriate for a summary phrase?


…
> semantic. This unnecessary return were detected with the help of the
> checkpatch.pl analysis tool with --strict --file option.

How do you think about to mention a “warning” better in the change description?

Would it be nicer to put such a hint into another paragraph?

Regards,
Markus

Re: [PATCH v5 1/3] dmaengine: dw-axi-dmac: fix Alignment should match open parenthesis

[Khairul Anuar Romli]

On 26/1/2026 7:12 pm, Markus Elfring wrote:
>> Correct alignment issue so that continuation lines properly match the
>> position of the opening parenthesis.
> 
> Line break?

Sure.
> 
> 
>>                                       This alignment issue were detected
> 
>                                         This issue was?
> 
Will put it in the next version

> 
>> with the help of the checkpatch.pl analysis tool with --strict --file
>> option.
> 
> Would it be nicer to put such information into another paragraph?
> 
Yeah, I will do this.

> 
>> - 'commit 1fe20f1b8454 ("dmaengine: Introduce DW AXI DMAC driver")'
>> - 'commit e32634f466a9 ("dma: dw-axi-dmac: support per channel
>>     interrupt")'
> 
> Is there a need to reformat such details a bit more?
> 
We are going back in the circle. I already put the details in the form 
of line and code but you mentioned I shall not list all the effected 
line before.

> 
> How do you think about to refine the summary phrase another bit?

I'll refine it.

> 
> Regards,
> Markus


Thanks.

Regards,
Khairul

Re: [v5 1/3] dmaengine: dw-axi-dmac: fix Alignment should match open parenthesis

[Markus Elfring]

>> Is there a need to reformat such details a bit more?
>>
> We are going back in the circle.

I hope not.

But we are stumbling on recurring challenges according to collateral evolution
and some communication difficulties.


> I already put the details in the form of line and code but you mentioned I shall not list all the effected line before.

It seems that you interpreted a bit of my patch review feedback
in undesirable directions.
Further contributors might become more helpful for corresponding clarifications.

Regards,
Markus