When i2c_new_dummy fails, the lack of error-handling code may
cause unexpected results.
This patch adds error-handling code after calling i2c_new_dummy.
Signed-off-by: Zhouyang Jia <jiazhouyang09@xxxxxxxxx>
---
drivers/hwmon/w83793.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/drivers/hwmon/w83793.c b/drivers/hwmon/w83793.c
index 0af0f62..4aa3a0e 100644
--- a/drivers/hwmon/w83793.c
+++ b/drivers/hwmon/w83793.c
@@ -1603,8 +1603,15 @@ w83793_detect_subclients(struct i2c_client *client)
}
tmp = w83793_read_value(client, W83793_REG_I2C_SUBADDR);
- if (!(tmp & 0x08))
+ if (!(tmp & 0x08)) {
data->lm75[0] = i2c_new_dummy(adapter, 0x48 + (tmp & 0x7));
+ if (data->lm75[0] == NULL) {
+ dev_err(&client->dev,
+ "Failed to allocate I2C device\n");
+ err = -ENODEV;
+ goto ERROR_SC_1;
+ }
+ }
if (!(tmp & 0x80)) {
if ((data->lm75[0] != NULL)
&& ((tmp & 0x7) == ((tmp >> 4) & 0x7))) {
@@ -1616,6 +1623,12 @@ w83793_detect_subclients(struct i2c_client *client)
}
data->lm75[1] = i2c_new_dummy(adapter,
0x48 + ((tmp >> 4) & 0x7));
+ if (data->lm75[1] == NULL) {
+ dev_err(&client->dev,
+ "Failed to allocate I2C device\n");
+ err = -ENODEV;
+ goto ERROR_SC_1;
+ }
}
return 0;
--
2.7.4
--
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