If the user write parameters resulted in no bytes being written to the temporary buffer, then ON_OFF_CONFIG will be written with uninitialized data. Prevent this by bailing out in this case. Signed-off-by: Eddie James <eajames@xxxxxxxxxxxxx> --- drivers/hwmon/pmbus/ibm-cffps.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/hwmon/pmbus/ibm-cffps.c b/drivers/hwmon/pmbus/ibm-cffps.c index 1c91ee1f9926..3795fe55b84f 100644 --- a/drivers/hwmon/pmbus/ibm-cffps.c +++ b/drivers/hwmon/pmbus/ibm-cffps.c @@ -250,7 +250,7 @@ static ssize_t ibm_cffps_debugfs_write(struct file *file, pmbus_set_page(psu->client, 0); rc = simple_write_to_buffer(&data, 1, ppos, buf, count); - if (rc < 0) + if (rc <= 0) return rc; rc = i2c_smbus_write_byte_data(psu->client, -- 2.24.0
