[PATCH 6.15 062/192] ALSA: ad1816a: Fix potential NULL pointer deref in snd_card_ad1816a_pnp()

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

6.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Thorsten Blum <thorsten.blum@linux.dev>

commit 043faef334a1f3d96ae88e1b7618bfa2b4946388 upstream.

Use pr_warn() instead of dev_warn() when 'pdev' is NULL to avoid a
potential NULL pointer dereference.

Cc: stable@vger.kernel.org
Fixes: 20869176d7a7 ("ALSA: ad1816a: Use standard print API")
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Link: https://patch.msgid.link/20250703200616.304309-2-thorsten.blum@linux.dev
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 sound/isa/ad1816a/ad1816a.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/sound/isa/ad1816a/ad1816a.c
+++ b/sound/isa/ad1816a/ad1816a.c
@@ -98,7 +98,7 @@ static int snd_card_ad1816a_pnp(int dev,
 	pdev = pnp_request_card_device(card, id->devs[1].id, NULL);
 	if (pdev == NULL) {
 		mpu_port[dev] = -1;
-		dev_warn(&pdev->dev, "MPU401 device busy, skipping.\n");
+		pr_warn("MPU401 device busy, skipping.\n");
 		return 0;
 	}