@@ -204,11 +204,18 @@ struct mn88443x_priv {
struct regmap *regmap_t;
};
-static void mn88443x_cmn_power_on(struct mn88443x_priv *chip)
+static int mn88443x_cmn_power_on(struct mn88443x_priv *chip)
{
+ struct device *dev = &chip->client_s->dev;
struct regmap *r_t = chip->regmap_t;
+ int ret;
- clk_prepare_enable(chip->mclk);
+ ret = clk_prepare_enable(chip->mclk);
+ if (ret) {
+ dev_err(dev, "Failed to prepare and enable mclk: %d\n",
+ ret);
+ return ret;
+ }
gpiod_set_value_cansleep(chip->reset_gpio, 1);
usleep_range(100, 1000);
@@ -222,6 +229,8 @@ static void mn88443x_cmn_power_on(struct mn88443x_priv *chip)
} else {
regmap_write(r_t, HIZSET3, 0x8f);
}
+
+ return 0;
}
static void mn88443x_cmn_power_off(struct mn88443x_priv *chip)
@@ -738,7 +747,10 @@ static int mn88443x_probe(struct i2c_client *client,
chip->fe.demodulator_priv = chip;
i2c_set_clientdata(client, chip);
- mn88443x_cmn_power_on(chip);
+ ret = mn88443x_cmn_power_on(chip);
+ if (ret)
+ goto err_i2c_t;
+
mn88443x_s_sleep(chip);
mn88443x_t_sleep(chip);
mn88443x_cmn_power_on() did not handle possible errors of clk_prepare_enable() and always finished successfully so that its caller mn88443x_probe() did not care about failed preparing/enabling of clocks as well. Add missed error handling in both mn88443x_cmn_power_on() and mn88443x_probe(). This required to change the return value of the former from "void" to "int". Found by Linux Driver Verification project (linuxtesting.org). Fixes: 0f408ce8941f ("media: dvb-frontends: add Socionext MN88443x ISDB-S/T demodulator driver") Signed-off-by: Evgeny Novikov <novikov@ispras.ru> Co-developed-by: Kirill Shilimanov <kirill.shilimanov@huawei.com> Signed-off-by: Kirill Shilimanov <kirill.shilimanov@huawei.com> --- drivers/media/dvb-frontends/mn88443x.c | 18 +++++++++++++++--- 1 file changed, 15 insertions(+), 3 deletions(-)