dmaengine: stm32-dma3: silently abort registration if no channel

ADESTM · ADESTM · commit a1b2655b17a6 · 2026-06-01T16:30:14.000+02:00
When all channels are reserved, abort the registration silently by using dev_dbg() instead of dev_err_probe(). Change-Id: I6631597c1459ea5a08785019847f34f53c5dcc2e Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com> Reviewed-on: https://gerrit.st.com/c/mpu/oe/st/linux-stm32/+/561954 Reviewed-by: Alain VOLMAT <alain.volmat@st.com> ACI: CITOOLS <MDG-smet-aci-reviews@list.st.com> ACI: CIBUILD <MDG-smet-aci-builds@list.st.com>
diff --git a/drivers/dma/stm32/stm32-dma3.c b/drivers/dma/stm32/stm32-dma3.c
@@ -2275,8 +2275,9 @@ static int stm32_dma3_probe(struct platform_device *pdev)
 	chan_reserved = stm32_dma3_check_rif(ddata);
 
 	if (chan_reserved == GENMASK(ddata->dma_channels - 1, 0)) {
+		/* There is no channel available, abort registration silently */
 		ret = -ENODEV;
-		dev_err_probe(&pdev->dev, ret, "No channel available, abort registration\n");
+		dev_dbg(&pdev->dev, "No channel available, abort registration\n");
 		goto err_clk_disable;
 	}
 

Original file line number	Diff line number	Diff line change
`@@ -2275,8 +2275,9 @@ static int stm32_dma3_probe(struct platform_device *pdev)`
`2275`	`2275`	`chan_reserved = stm32_dma3_check_rif(ddata);`
`2276`	`2276`
`2277`	`2277`	`if (chan_reserved == GENMASK(ddata->dma_channels - 1, 0)) {`
	`2278`	`+ /* There is no channel available, abort registration silently */`
`2278`	`2279`	`ret = -ENODEV;`
`2279`		`- dev_err_probe(&pdev->dev, ret, "No channel available, abort registration\n");`
	`2280`	`+ dev_dbg(&pdev->dev, "No channel available, abort registration\n");`
`2280`	`2281`	`goto err_clk_disable;`
`2281`	`2282`	`}`
`2282`	`2283`