Re: [Linux-stm32] [PATCH] dmaengine: stm32-dmamux: Fix PM disable depth imbalance in stm32_dmamux_probe
From: Amelie DELAUNAY
Date: Mon Jan 10 2022 - 11:11:22 EST
On 1/8/22 9:53 AM, Miaoqian Lin wrote:
The pm_runtime_enable will increase power disable depth.
If the probe fails, we should use pm_runtime_disable() to balance
pm_runtime_enable().
Fixes: 4f3ceca254e0 ("dmaengine: stm32-dmamux: Add PM Runtime support")
Signed-off-by: Miaoqian Lin <linmq006@xxxxxxxxx>
Thanks for your patch,
Reviewed-by: Amelie Delaunay <amelie.delaunay@xxxxxxxxxxx>
---
drivers/dma/stm32-dmamux.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/dma/stm32-dmamux.c b/drivers/dma/stm32-dmamux.c
index a42164389ebc..d5d55732adba 100644
--- a/drivers/dma/stm32-dmamux.c
+++ b/drivers/dma/stm32-dmamux.c
@@ -292,10 +292,12 @@ static int stm32_dmamux_probe(struct platform_device *pdev)
ret = of_dma_router_register(node, stm32_dmamux_route_allocate,
&stm32_dmamux->dmarouter);
if (ret)
- goto err_clk;
+ goto pm_disable;
return 0;
+pm_disable:
+ pm_runtime_disable(&pdev->dev);
err_clk:
clk_disable_unprepare(stm32_dmamux->clk);