[PATCH] ASoC: sti: initialize IRQ lock before requesting IRQ

[Runyu Xiao]

uni_reader_init() registers the shared IRQ before initializing
reader->irq_lock. A pending interrupt can invoke the handler while the
lock is still uninitialized.

Initialize the lock before registering the IRQ so the interrupt path
always sees valid lock state.

Fixes: d05d862ead8e ("ASoC: STI: Fix null ptr deference in IRQ handler")
Cc: stable@xxxxxxxxxxxxxxx
Assisted-by: Codex:GPT-5
Signed-off-by: Runyu Xiao <runyu.xiao@xxxxxxxxxx>
---
 sound/soc/sti/uniperif_reader.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/sti/uniperif_reader.c b/sound/soc/sti/uniperif_reader.c
index 45d7613f5..5347f9620 100644
--- a/sound/soc/sti/uniperif_reader.c
+++ b/sound/soc/sti/uniperif_reader.c
@@ -416,6 +416,8 @@ int uni_reader_init(struct platform_device *pdev,
 	else
 		reader->hw = &uni_reader_pcm_hw;
 
+	spin_lock_init(&reader->irq_lock);
+
 	ret = devm_request_irq(&pdev->dev, reader->irq,
 			       uni_reader_irq_handler, IRQF_SHARED,
 			       dev_name(&pdev->dev), reader);
@@ -424,8 +426,6 @@ int uni_reader_init(struct platform_device *pdev,
 		return -EBUSY;
 	}
 
-	spin_lock_init(&reader->irq_lock);
-
 	return 0;
 }
 EXPORT_SYMBOL_GPL(uni_reader_init);
-- 
2.34.1