[PATCH v2] dmaengine: loongson: Remove the %p pointer output

[PATCH v2] dmaengine: loongson: Remove the %p pointer output

[Sebastian Andrzej Siewior]

The %pK format modifier was meant for /proc kind of output, not general
printk output. Since commit ad67b74d2469d ("printk: hash addresses
printed with %p") pointers are hashed by default and the behaviour can
be controller by `hash_pointers' boot argument.
The policy on %p is to not introduce new ones. This is the only pointer
output in the driver.

Remove the pointer formating from debug output.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
v1…v2: https://lore.kernel.org/all/20260918103409.UV4g2ON7@linutronix.de/
  - Update subject line (it is removed, not replaced).

 drivers/dma/loongson/loongson2-apb-cmc-dma.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/dma/loongson/loongson2-apb-cmc-dma.c b/drivers/dma/loongson/loongson2-apb-cmc-dma.c
index 1c9a542edc859..27f8f7a5738d9 100644
--- a/drivers/dma/loongson/loongson2-apb-cmc-dma.c
+++ b/drivers/dma/loongson/loongson2-apb-cmc-dma.c
@@ -337,7 +337,6 @@ static void loongson2_cmc_dma_issue_pending(struct dma_chan *chan)
 	guard(spinlock_irqsave)(&lchan->vchan.lock);
 
 	if (vchan_issue_pending(&lchan->vchan) && !lchan->desc) {
-		dev_dbg(chan2dev(lchan), "vchan %pK: issued\n", &lchan->vchan);
 		loongson2_cmc_dma_start_transfer(lchan);
 	}
 }
-- 
2.55.0

Re: [PATCH v2] dmaengine: loongson: Remove the %p pointer output

[Frank Li]

On Fri, Sep 18, 2026 at 10:17:14PM +0200, Sebastian Andrzej Siewior wrote:
> The %pK format modifier was meant for /proc kind of output, not general
> printk output. Since commit ad67b74d2469d ("printk: hash addresses
> printed with %p") pointers are hashed by default and the behaviour can
> be controller by `hash_pointers' boot argument.
> The policy on %p is to not introduce new ones. This is the only pointer
> output in the driver.
>
> Remove the pointer formating from debug output.
>
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
> ---
> v1…v2: https://lore.kernel.org/all/20260918103409.UV4g2ON7@linutronix.de/
>   - Update subject line (it is removed, not replaced).

please careful,

remove whole dev_dbg() when vchan_issue_pending() failure.

commit messesge should show why it is okay to remove dev_dbg() here.

Frank

>
>  drivers/dma/loongson/loongson2-apb-cmc-dma.c | 1 -
>  1 file changed, 1 deletion(-)
>
> diff --git a/drivers/dma/loongson/loongson2-apb-cmc-dma.c b/drivers/dma/loongson/loongson2-apb-cmc-dma.c
> index 1c9a542edc859..27f8f7a5738d9 100644
> --- a/drivers/dma/loongson/loongson2-apb-cmc-dma.c
> +++ b/drivers/dma/loongson/loongson2-apb-cmc-dma.c
> @@ -337,7 +337,6 @@ static void loongson2_cmc_dma_issue_pending(struct dma_chan *chan)
>  	guard(spinlock_irqsave)(&lchan->vchan.lock);
>
>  	if (vchan_issue_pending(&lchan->vchan) && !lchan->desc) {
> -		dev_dbg(chan2dev(lchan), "vchan %pK: issued\n", &lchan->vchan);
>  		loongson2_cmc_dma_start_transfer(lchan);
>  	}
>  }
> --
> 2.55.0
>