linux-kernel - [PATCH 4.19 22/38] ALSA: drivers: opl3: Fix incorrect use of vp->state

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Message-Id: <20211227151320.113475760@linuxfoundation.org>
Date:   Mon, 27 Dec 2021 16:30:59 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Colin Ian King <colin.i.king@...il.com>,
        Takashi Iwai <tiwai@...e.de>
Subject: [PATCH 4.19 22/38] ALSA: drivers: opl3: Fix incorrect use of vp->state

From: Colin Ian King <colin.i.king@...il.com>

commit 2dee54b289fbc810669a1b2b8a0887fa1c9a14d7 upstream.

Static analysis with scan-build has found an assignment to vp2 that is
never used. It seems that the check on vp->state > 0 should be actually
on vp2->state instead. Fix this.

This dates back to 2002, I found the offending commit from the git
history git://git.kernel.org/pub/scm/linux/kernel/git/tglx/history.git,
commit 91e39521bbf6 ("[PATCH] ALSA patch for 2.5.4")

Signed-off-by: Colin Ian King <colin.i.king@...il.com>
Cc: <stable@...r.kernel.org>
Link: https://lore.kernel.org/r/20211212172025.470367-1-colin.i.king@gmail.com
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 sound/drivers/opl3/opl3_midi.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/sound/drivers/opl3/opl3_midi.c
+++ b/sound/drivers/opl3/opl3_midi.c
@@ -412,7 +412,7 @@ void snd_opl3_note_on(void *p, int note,
 	}
 	if (instr_4op) {
 		vp2 = &opl3->voices[voice + 3];
-		if (vp->state > 0) {
+		if (vp2->state > 0) {
 			opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK +
 					       voice_offset + 3);
 			reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT;