4.5-stable review patch. If anyone has any objections, please let me know.
------------------ From: Christophe Ricard <[email protected]> commit b58afe6d6d3a53af165d5946f12c4b08c95acd58 upstream. Fix static checker warning: drivers/nfc/st21nfca/i2c.c:530 st21nfca_hci_i2c_acpi_request_resources() error: 'gpiod_ena' dereferencing possible ERR_PTR() Fix so that if no enable gpio can be retrieved an -ENODEV is returned. Reported-by: Dan Carpenter <[email protected]> Fixes: dfa8070d7f64 ("nfc: st21nfca: Add support for acpi probing for i2c device.") Signed-off-by: Christophe Ricard <[email protected]> Signed-off-by: Samuel Ortiz <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/nfc/st21nfca/i2c.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) --- a/drivers/nfc/st21nfca/i2c.c +++ b/drivers/nfc/st21nfca/i2c.c @@ -524,8 +524,10 @@ static int st21nfca_hci_i2c_acpi_request /* Get EN GPIO from ACPI */ gpiod_ena = devm_gpiod_get_index(dev, ST21NFCA_GPIO_NAME_EN, 1, GPIOD_OUT_LOW); - if (!IS_ERR(gpiod_ena)) - phy->gpio_ena = desc_to_gpio(gpiod_ena); + if (!IS_ERR(gpiod_ena)) { + nfc_err(dev, "Unable to get ENABLE GPIO\n"); + return -ENODEV; + } phy->gpio_ena = desc_to_gpio(gpiod_ena);
