ASoC: Intel: Boards: Fix NULL pointer deref in BYT/CHT

Merge series from Hans de Goede <hdegoede@redhat.com>:

While testing 6.8 on a Bay Trail device with a ALC5640 codec
I noticed a regression in 6.8 which causes a NULL pointer deref
in probe().

All BYT/CHT Intel machine drivers are affected. Patch 1/2 of
this series fixes all of them.

Patch 2/2 adds some small cleanups to cht_bsw_rt5645.c for
issues which I noticed while working on 1/2.

Author: broonie

sound/soc/intel/boards/bytcht_cx2072x.c

@@ -241,7 +241,8 @@ static int snd_byt_cht_cx2072x_probe(struct platform_device *pdev)
 
 	/* fix index of codec dai */
 	for (i = 0; i < ARRAY_SIZE(byt_cht_cx2072x_dais); i++) {
-		if (!strcmp(byt_cht_cx2072x_dais[i].codecs->name,
+		if (byt_cht_cx2072x_dais[i].codecs->name &&
+		    !strcmp(byt_cht_cx2072x_dais[i].codecs->name,
 			    "i2c-14F10720:00")) {
 			dai_index = i;
 			break;

sound/soc/intel/boards/bytcht_da7213.c

@@ -245,7 +245,8 @@ static int bytcht_da7213_probe(struct platform_device *pdev)
 
 	/* fix index of codec dai */
 	for (i = 0; i < ARRAY_SIZE(dailink); i++) {
-		if (!strcmp(dailink[i].codecs->name, "i2c-DLGS7213:00")) {
+		if (dailink[i].codecs->name &&
+		    !strcmp(dailink[i].codecs->name, "i2c-DLGS7213:00")) {
 			dai_index = i;
 			break;
 		}

sound/soc/intel/boards/bytcht_es8316.c

@@ -546,7 +546,8 @@ static int snd_byt_cht_es8316_mc_probe(struct platform_device *pdev)
 
 	/* fix index of codec dai */
 	for (i = 0; i < ARRAY_SIZE(byt_cht_es8316_dais); i++) {
-		if (!strcmp(byt_cht_es8316_dais[i].codecs->name,
+		if (byt_cht_es8316_dais[i].codecs->name &&
+		    !strcmp(byt_cht_es8316_dais[i].codecs->name,
 			    "i2c-ESSX8316:00")) {
 			dai_index = i;
 			break;

sound/soc/intel/boards/bytcr_rt5640.c

@@ -1652,7 +1652,8 @@ static int snd_byt_rt5640_mc_probe(struct platform_device *pdev)
 
 	/* fix index of codec dai */
 	for (i = 0; i < ARRAY_SIZE(byt_rt5640_dais); i++) {
-		if (!strcmp(byt_rt5640_dais[i].codecs->name,
+		if (byt_rt5640_dais[i].codecs->name &&
+		    !strcmp(byt_rt5640_dais[i].codecs->name,
 			    "i2c-10EC5640:00")) {
 			dai_index = i;
 			break;

sound/soc/intel/boards/bytcr_rt5651.c

@@ -910,7 +910,8 @@ static int snd_byt_rt5651_mc_probe(struct platform_device *pdev)
 
 	/* fix index of codec dai */
 	for (i = 0; i < ARRAY_SIZE(byt_rt5651_dais); i++) {
-		if (!strcmp(byt_rt5651_dais[i].codecs->name,
+		if (byt_rt5651_dais[i].codecs->name &&
+		    !strcmp(byt_rt5651_dais[i].codecs->name,
 			    "i2c-10EC5651:00")) {
 			dai_index = i;
 			break;

sound/soc/intel/boards/bytcr_wm5102.c

@@ -605,7 +605,8 @@ static int snd_byt_wm5102_mc_probe(struct platform_device *pdev)
 
 	/* find index of codec dai */
 	for (i = 0; i < ARRAY_SIZE(byt_wm5102_dais); i++) {
-		if (!strcmp(byt_wm5102_dais[i].codecs->name,
+		if (byt_wm5102_dais[i].codecs->name &&
+		    !strcmp(byt_wm5102_dais[i].codecs->name,
 			    "wm5102-codec")) {
 			dai_index = i;
 			break;

sound/soc/intel/boards/cht_bsw_rt5645.c

@@ -40,7 +40,6 @@ struct cht_acpi_card {
 struct cht_mc_private {
 	struct snd_soc_jack jack;
 	struct cht_acpi_card *acpi_card;
-	char codec_name[SND_ACPI_I2C_ID_LEN];
 	struct clk *mclk;
 };
 
@@ -567,14 +566,14 @@ static int snd_cht_mc_probe(struct platform_device *pdev)
 	}
 
 	card->dev = &pdev->dev;
-	sprintf(drv->codec_name, "i2c-%s:00", drv->acpi_card->codec_id);
 
 	/* set correct codec name */
 	for (i = 0; i < ARRAY_SIZE(cht_dailink); i++)
-		if (!strcmp(card->dai_link[i].codecs->name,
+		if (cht_dailink[i].codecs->name &&
+		    !strcmp(cht_dailink[i].codecs->name,
 			    "i2c-10EC5645:00")) {
-			card->dai_link[i].codecs->name = drv->codec_name;
 			dai_index = i;
+			break;
 		}
 
 	/* fixup codec name based on HID */

sound/soc/intel/boards/cht_bsw_rt5672.c

@@ -466,7 +466,8 @@ static int snd_cht_mc_probe(struct platform_device *pdev)
 
 	/* find index of codec dai */
 	for (i = 0; i < ARRAY_SIZE(cht_dailink); i++) {
-		if (!strcmp(cht_dailink[i].codecs->name, RT5672_I2C_DEFAULT)) {
+		if (cht_dailink[i].codecs->name &&
+		    !strcmp(cht_dailink[i].codecs->name, RT5672_I2C_DEFAULT)) {
 			dai_index = i;
 			break;
 		}