[09/10] ASoC: cs43130: Minor error paths fixups

Message ID 20210510131357.17170-10-ckeepax@opensource.cirrus.com
State New
Headers show
Series
  • Tidy up device ID reading on legacy Cirrus parts
Related show

Commit Message

Charles Keepax May 10, 2021, 1:13 p.m.
Correct some unchecked re-allocations of ret whilst reading the device
ID and ensure the hardware state is returned to off on the error
paths.

Reported-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
---
 sound/soc/codecs/cs43130.c | 31 +++++++++++++++++++------------
 1 file changed, 19 insertions(+), 12 deletions(-)

Patch

diff --git a/sound/soc/codecs/cs43130.c b/sound/soc/codecs/cs43130.c
index 80bc7c10ed757..642338cdc8b65 100644
--- a/sound/soc/codecs/cs43130.c
+++ b/sound/soc/codecs/cs43130.c
@@ -36,6 +36,7 @@ 
 #include <sound/jack.h>
 
 #include "cs43130.h"
+#include "cirrus_legacy.h"
 
 static const struct reg_default cs43130_reg_defaults[] = {
 	{CS43130_SYS_CLK_CTL_1, 0x06},
@@ -2424,9 +2425,8 @@  static int cs43130_i2c_probe(struct i2c_client *client,
 {
 	struct cs43130_private *cs43130;
 	int ret;
-	unsigned int devid = 0;
 	unsigned int reg;
-	int i;
+	int i, devid;
 
 	cs43130 = devm_kzalloc(&client->dev, sizeof(*cs43130), GFP_KERNEL);
 	if (!cs43130)
@@ -2464,20 +2464,21 @@  static int cs43130_i2c_probe(struct i2c_client *client,
 
 	cs43130->reset_gpio = devm_gpiod_get_optional(&client->dev,
 						      "reset", GPIOD_OUT_LOW);
-	if (IS_ERR(cs43130->reset_gpio))
-		return PTR_ERR(cs43130->reset_gpio);
+	if (IS_ERR(cs43130->reset_gpio)) {
+		ret = PTR_ERR(cs43130->reset_gpio);
+		goto err_supplies;
+	}
 
 	gpiod_set_value_cansleep(cs43130->reset_gpio, 1);
 
 	usleep_range(2000, 2050);
 
-	ret = regmap_read(cs43130->regmap, CS43130_DEVID_AB, &reg);
-
-	devid = (reg & 0xFF) << 12;
-	ret = regmap_read(cs43130->regmap, CS43130_DEVID_CD, &reg);
-	devid |= (reg & 0xFF) << 4;
-	ret = regmap_read(cs43130->regmap, CS43130_DEVID_E, &reg);
-	devid |= (reg & 0xF0) >> 4;
+	devid = cirrus_read_device_id(cs43130->regmap, CS43130_DEVID_AB);
+	if (devid < 0) {
+		ret = devid;
+		dev_err(&client->dev, "Failed to read device ID: %d\n", ret);
+		goto err;
+	}
 
 	switch (devid) {
 	case CS43130_CHIP_ID:
@@ -2517,7 +2518,7 @@  static int cs43130_i2c_probe(struct i2c_client *client,
 					"cs43130", cs43130);
 	if (ret != 0) {
 		dev_err(&client->dev, "Failed to request IRQ: %d\n", ret);
-		return ret;
+		goto err;
 	}
 
 	cs43130->mclk_int_src = CS43130_MCLK_SRC_RCO;
@@ -2576,7 +2577,13 @@  static int cs43130_i2c_probe(struct i2c_client *client,
 			   CS43130_XSP_3ST_MASK, 0);
 
 	return 0;
+
 err:
+	gpiod_set_value_cansleep(cs43130->reset_gpio, 0);
+err_supplies:
+	regulator_bulk_disable(ARRAY_SIZE(cs43130->supplies),
+			       cs43130->supplies);
+
 	return ret;
 }