ALSA: ctxfi: Check the error for index mapping

The ctxfi driver blindly assumed a proper value returned from
daio_device_index(), but it's not always true.  Add a proper error
check to deal with the error from the function.

Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/87cy149n6k.wl-tiwai@suse.de
Link: https://patch.msgid.link/20260329091240.420194-2-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 52 insertions, 33 deletions

diff --git a/sound/pci/ctxfi/ctdaio.c b/sound/pci/ctxfi/ctdaio.c
index 19faa81d54005..4dbb1dd7af32f 100644
--- a/sound/pci/ctxfi/ctdaio.c
+++ b/sound/pci/ctxfi/ctdaio.c
@@ -99,7 +99,7 @@ static const struct rsc_ops daio_in_rsc_ops_20k2 = {
 	.output_slot	= daio_index,
 };
 
-static unsigned int daio_device_index(enum DAIOTYP type, struct hw *hw)
+static int daio_device_index(enum DAIOTYP type, struct hw *hw)
 {
 	switch (hw->chip_type) {
 	case ATC20K1:
@@ -112,7 +112,9 @@ static unsigned int daio_device_index(enum DAIOTYP type, struct hw *hw)
 		case LINEO3:	return 5;
 		case LINEO4:	return 6;
 		case LINEIM:	return 7;
-		default:	return -EINVAL;
+		default:
+			pr_err("ctxfi: Invalid type %d for hw20k1\n", type);
+			return -EINVAL;
 		}
 	case ATC20K2:
 		switch (type) {
@@ -126,9 +128,12 @@ static unsigned int daio_device_index(enum DAIOTYP type, struct hw *hw)
 		case LINEIM:	return 4;
 		case MIC:	return 5;
 		case RCA:	return 3;
-		default:	return -EINVAL;
+		default:
+			pr_err("ctxfi: Invalid type %d for hw20k2\n", type);
+			return -EINVAL;
 		}
 	default:
+		pr_err("ctxfi: Invalid chip type %d\n", hw->chip_type);
 		return -EINVAL;
 	}
 }
@@ -149,8 +154,11 @@ static int dao_spdif_set_spos(struct dao *dao, unsigned int spos)
 
 static int dao_commit_write(struct dao *dao)
 {
-	dao->hw->dao_commit_write(dao->hw,
-		daio_device_index(dao->daio.type, dao->hw), dao->ctrl_blk);
+	int idx = daio_device_index(dao->daio.type, dao->hw);
+
+	if (idx < 0)
+		return idx;
+	dao->hw->dao_commit_write(dao->hw, idx, dao->ctrl_blk);
 	return 0;
 }
 
@@ -288,8 +296,11 @@ static int dai_set_enb_srt(struct dai *dai, unsigned int enb)
 
 static int dai_commit_write(struct dai *dai)
 {
-	dai->hw->dai_commit_write(dai->hw,
-		daio_device_index(dai->daio.type, dai->hw), dai->ctrl_blk);
+	int idx = daio_device_index(dai->daio.type, dai->hw);
+
+	if (idx < 0)
+		return idx;
+	dai->hw->dai_commit_write(dai->hw, idx, dai->ctrl_blk);
 	return 0;
 }
 
@@ -368,7 +379,7 @@ static int dao_rsc_init(struct dao *dao,
 {
 	struct hw *hw = mgr->mgr.hw;
 	unsigned int conf;
-	int err;
+	int idx, err;
 
 	err = daio_rsc_init(&dao->daio, desc, mgr->mgr.hw);
 	if (err)
@@ -387,15 +398,18 @@ static int dao_rsc_init(struct dao *dao,
 	if (err)
 		goto error2;
 
-	hw->daio_mgr_dsb_dao(mgr->mgr.ctrl_blk,
-			daio_device_index(dao->daio.type, hw));
+	idx = daio_device_index(dao->daio.type, hw);
+	if (idx < 0) {
+		err = idx;
+		goto error2;
+	}
+
+	hw->daio_mgr_dsb_dao(mgr->mgr.ctrl_blk, idx);
 	hw->daio_mgr_commit_write(hw, mgr->mgr.ctrl_blk);
 
 	conf = (desc->msr & 0x7) | (desc->passthru << 3);
-	hw->daio_mgr_dao_init(hw, mgr->mgr.ctrl_blk,
-			daio_device_index(dao->daio.type, hw), conf);
-	hw->daio_mgr_enb_dao(mgr->mgr.ctrl_blk,
-			daio_device_index(dao->daio.type, hw));
+	hw->daio_mgr_dao_init(hw, mgr->mgr.ctrl_blk, idx, conf);
+	hw->daio_mgr_enb_dao(mgr->mgr.ctrl_blk, idx);
 	hw->daio_mgr_commit_write(hw, mgr->mgr.ctrl_blk);
 
 	return 0;
@@ -444,7 +458,7 @@ static int dai_rsc_init(struct dai *dai,
 			const struct daio_desc *desc,
 			struct daio_mgr *mgr)
 {
-	int err;
+	int idx, err;
 	struct hw *hw = mgr->mgr.hw;
 	unsigned int rsr, msr;
 
@@ -458,6 +472,12 @@ static int dai_rsc_init(struct dai *dai,
 	if (err)
 		goto error1;
 
+	idx = daio_device_index(dai->daio.type, dai->hw);
+	if (idx < 0) {
+		err = idx;
+		goto error1;
+	}
+
 	for (rsr = 0, msr = desc->msr; msr > 1; msr >>= 1)
 		rsr++;
 
@@ -466,8 +486,7 @@ static int dai_rsc_init(struct dai *dai,
 	/* default to disabling control of a SRC */
 	hw->dai_srt_set_ec(dai->ctrl_blk, 0);
 	hw->dai_srt_set_et(dai->ctrl_blk, 0); /* default to disabling SRT */
-	hw->dai_commit_write(hw,
-		daio_device_index(dai->daio.type, dai->hw), dai->ctrl_blk);
+	hw->dai_commit_write(hw, idx, dai->ctrl_blk);
 
 	return 0;
 
@@ -582,28 +601,28 @@ static int put_daio_rsc(struct daio_mgr *mgr, struct daio *daio)
 static int daio_mgr_enb_daio(struct daio_mgr *mgr, struct daio *daio)
 {
 	struct hw *hw = mgr->mgr.hw;
-
-	if (daio->output) {
-		hw->daio_mgr_enb_dao(mgr->mgr.ctrl_blk,
-				daio_device_index(daio->type, hw));
-	} else {
-		hw->daio_mgr_enb_dai(mgr->mgr.ctrl_blk,
-				daio_device_index(daio->type, hw));
-	}
+	int idx = daio_device_index(daio->type, hw);
+
+	if (idx < 0)
+		return idx;
+	if (daio->output)
+		hw->daio_mgr_enb_dao(mgr->mgr.ctrl_blk, idx);
+	else
+		hw->daio_mgr_enb_dai(mgr->mgr.ctrl_blk, idx);
 	return 0;
 }
 
 static int daio_mgr_dsb_daio(struct daio_mgr *mgr, struct daio *daio)
 {
 	struct hw *hw = mgr->mgr.hw;
-
-	if (daio->output) {
-		hw->daio_mgr_dsb_dao(mgr->mgr.ctrl_blk,
-				daio_device_index(daio->type, hw));
-	} else {
-		hw->daio_mgr_dsb_dai(mgr->mgr.ctrl_blk,
-				daio_device_index(daio->type, hw));
-	}
+	int idx = daio_device_index(daio->type, hw);
+
+	if (idx < 0)
+		return idx;
+	if (daio->output)
+		hw->daio_mgr_dsb_dao(mgr->mgr.ctrl_blk, idx);
+	else
+		hw->daio_mgr_dsb_dai(mgr->mgr.ctrl_blk, idx);
 	return 0;
 }