diff options
Diffstat (limited to 'drivers/i2c/i2c-slave-testunit.c')
| -rw-r--r-- | drivers/i2c/i2c-slave-testunit.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/i2c/i2c-slave-testunit.c b/drivers/i2c/i2c-slave-testunit.c index 9fe3150378e8..0d6fbaa48248 100644 --- a/drivers/i2c/i2c-slave-testunit.c +++ b/drivers/i2c/i2c-slave-testunit.c @@ -183,6 +183,10 @@ static void i2c_slave_testunit_work(struct work_struct *work) break; case TU_CMD_SMBUS_ALERT_REQUEST: + if (!tu->gpio) { + ret = -ENOENT; + break; + } i2c_slave_unregister(tu->client); orig_addr = tu->client->addr; tu->client->addr = 0x0c; @@ -232,6 +236,9 @@ static int i2c_slave_testunit_probe(struct i2c_client *client) INIT_DELAYED_WORK(&tu->worker, i2c_slave_testunit_work); tu->gpio = devm_gpiod_get_index_optional(&client->dev, NULL, 0, GPIOD_OUT_LOW); + if (IS_ERR(tu->gpio)) + return PTR_ERR(tu->gpio); + if (gpiod_cansleep(tu->gpio)) { dev_err(&client->dev, "GPIO access which may sleep is not allowed\n"); return -EDEADLK; |