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nfc: st21nfca: Fix static checker warning 

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 <dan.carpenter@oracle.com>
Fixes: dfa8070d7f ("nfc: st21nfca: Add support for acpi probing for i2c device.")
Cc: stable@vger.kernel.org
Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Christophe Ricard 2016-04-30 09:12:34 +02:00 committed by Samuel Ortiz
parent dfeb87df48
commit b58afe6d6d
1 changed files with 4 additions and 2 deletions
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6
drivers/nfc/st21nfca/i2c.c
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@ -524,8 +524,10 @@ static int st21nfca_hci_i2c_acpi_request_resources(struct i2c_client *client)
/* 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);