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hwmon: (adt7475) Make adt7475_read_word() return errors

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[ Upstream commit f196dec6d50abb2e65fb54a0621b2f1b4d922995 ]

The adt7475_read_word() function was meant to return negative error
codes on failure.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Tokunori Ikegami <ikegami@allied-telesis.co.jp>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dan Carpenter 2018-08-14 13:07:47 +03:00 • committed by Greg Kroah-Hartman
parent 94516f10f3
commit 55aaf8e0d9
1 changed files with 9 additions and 5 deletions
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14
drivers/hwmon/adt7475.c
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@ -274,14 +274,18 @@ static inline u16 volt2reg(int channel, long volt, u8 bypass_attn)
return clamp_val(reg, 0, 1023) & (0xff << 2);
}
static u16 adt7475_read_word(struct i2c_client *client, int reg)
static int adt7475_read_word(struct i2c_client *client, int reg)
{
u16 val;
int val1, val2;
val = i2c_smbus_read_byte_data(client, reg);
val |= (i2c_smbus_read_byte_data(client, reg + 1) << 8);
val1 = i2c_smbus_read_byte_data(client, reg);
if (val1 < 0)
return val1;
val2 = i2c_smbus_read_byte_data(client, reg + 1);
if (val2 < 0)
return val2;
return val;
return val1 | (val2 << 8);
}
static void adt7475_write_word(struct i2c_client *client, int reg, u16 val)