On 11/17/25 17:12, Johan Hovold wrote:

Make sure to drop the reference taken to the DMA master OF node also on late route allocation failures.

Fixes: df7e762db5f6 ("dmaengine: Add STM32 DMAMUX driver") Cc: stable@vger.kernel.org # 4.15 Cc: Pierre-Yves MORDRET pierre-yves.mordret@foss.st.com Signed-off-by: Johan Hovold johan@kernel.org

Reviewed-by: Amelie Delaunay amelie.delaunay@foss.st.com

---

drivers/dma/stm32/stm32-dmamux.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/stm32/stm32-dmamux.c b/drivers/dma/stm32/stm32-dmamux.c index 791179760782..2bd218dbabbb 100644 --- a/drivers/dma/stm32/stm32-dmamux.c +++ b/drivers/dma/stm32/stm32-dmamux.c @@ -143,7 +143,7 @@ static void *stm32_dmamux_route_allocate(struct of_phandle_args *dma_spec, ret = pm_runtime_resume_and_get(&pdev->dev); if (ret < 0) { spin_unlock_irqrestore(&dmamux->lock, flags);

• goto error;
  

• goto err_put_dma_spec_np;
  

  } spin_unlock_irqrestore(&dmamux->lock, flags);

@@ -165,6 +165,8 @@ static void *stm32_dmamux_route_allocate(struct of_phandle_args *dma_spec, return mux; +err_put_dma_spec_np:

• of_node_put(dma_spec->np); error: clear_bit(mux->chan_id, dmamux->dma_inuse);