ASoC: stm32: sai: fix clk prepare imbalance on probe failure

commit 312ec2f0d9d1a5656f76d770bbf1d967e9289aa7 upstream.

Make sure to unprepare the parent clock also on probe failures (e.g.
probe deferral).

Fixes: a14bf98c045b ("ASoC: stm32: sai: fix possible circular locking")
Cc: stable@vger.kernel.org	# 5.5
Cc: Olivier Moysan <olivier.moysan@st.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: olivier moysan <olivier.moysan@foss.st.com>
Link: https://patch.msgid.link/20251124104908.15754-3-johan@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/sound/soc/stm/stm32_sai_sub.c b/sound/soc/stm/stm32_sai_sub.c
index 5938d6361e1ec4a5b4cb2ab24c3066bc715ce6e7..65b3adbaaa0b74dcc7c90989e782e4c9c069f1ad 100644 (file)
--- a/sound/soc/stm/stm32_sai_sub.c
+++ b/sound/soc/stm/stm32_sai_sub.c
@@ -1501,14 +1501,21 @@ static int stm32_sai_sub_parse_of(struct platform_device *pdev,
        if (of_property_present(np, "#clock-cells")) {
                ret = stm32_sai_add_mclk_provider(sai);
                if (ret < 0)
-                       return ret;
+                       goto err_unprepare_pclk;
        } else {
                sai->sai_mclk = devm_clk_get_optional(&pdev->dev, "MCLK");
-               if (IS_ERR(sai->sai_mclk))
-                       return PTR_ERR(sai->sai_mclk);
+               if (IS_ERR(sai->sai_mclk)) {
+                       ret = PTR_ERR(sai->sai_mclk);
+                       goto err_unprepare_pclk;
+               }
        }
 
        return 0;
+
+err_unprepare_pclk:
+       clk_unprepare(sai->pdata->pclk);
+
+       return ret;
 }
 
 static int stm32_sai_sub_probe(struct platform_device *pdev)
@@ -1548,26 +1555,33 @@ static int stm32_sai_sub_probe(struct platform_device *pdev)
                               IRQF_SHARED, dev_name(&pdev->dev), sai);
        if (ret) {
                dev_err(&pdev->dev, "IRQ request returned %d\n", ret);
-               return ret;
+               goto err_unprepare_pclk;
        }
 
        if (STM_SAI_PROTOCOL_IS_SPDIF(sai))
                conf = &stm32_sai_pcm_config_spdif;
 
        ret = snd_dmaengine_pcm_register(&pdev->dev, conf, 0);
-       if (ret)
-               return dev_err_probe(&pdev->dev, ret, "Could not register pcm dma\n");
+       if (ret) {
+               ret = dev_err_probe(&pdev->dev, ret, "Could not register pcm dma\n");
+               goto err_unprepare_pclk;
+       }
 
        ret = snd_soc_register_component(&pdev->dev, &stm32_component,
                                         &sai->cpu_dai_drv, 1);
        if (ret) {
                snd_dmaengine_pcm_unregister(&pdev->dev);
-               return ret;
+               goto err_unprepare_pclk;
        }
 
        pm_runtime_enable(&pdev->dev);
 
        return 0;
+
+err_unprepare_pclk:
+       clk_unprepare(sai->pdata->pclk);
+
+       return ret;
 }
 
 static void stm32_sai_sub_remove(struct platform_device *pdev)