[PATCH v1 2/5] extcon: Return -EPROBE_DEFER when extcon device is not found

Andy Shevchenko
2018-11-10T18:10:58Z

All current users of extcon_get_extcon_dev() API considers
an extcon device a mandatory to appear. Thus, they all convert
NULL pointer to -EPROBE_DEFER error code.

There is one more caller anticipated with the same requirements.

To decrease a code duplication and a burden to the callers,
return -EPROBE_DEFER directly from extcon_get_extcon_dev().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
drivers/extcon/extcon-axp288.c | 4 ++--
drivers/extcon/extcon.c | 2 +-
drivers/power/supply/axp288_charger.c | 8 ++++----
drivers/usb/phy/phy-omap-otg.c | 6 +++---
drivers/usb/typec/tcpm/fusb302.c | 4 ++--
5 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/drivers/extcon/extcon-axp288.c b/drivers/extcon/extcon-axp288.c
index a983708b77a6..3472d3b756ed 100644
--- a/drivers/extcon/extcon-axp288.c
+++ b/drivers/extcon/extcon-axp288.c
@@ -360,8 +360,8 @@ static int axp288_extcon_probe(struct platform_device *pdev)
name = acpi_dev_get_first_match_name("INT3496", NULL, -1);
if (name) {
info->id_extcon = extcon_get_extcon_dev(name);
- if (!info->id_extcon)
- return -EPROBE_DEFER;
+ if (IS_ERR(info->id_extcon))
+ return PTR_ERR(info->id_extcon);

dev_info(dev, "controlling USB role\n");
} else {
diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c
index 5ab0498be652..2bd0f2f33f05 100644
--- a/drivers/extcon/extcon.c
+++ b/drivers/extcon/extcon.c
@@ -884,7 +884,7 @@ struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name)
if (!strcmp(sd->name, extcon_name))
goto out;
}
- sd = NULL;
+ sd = ERR_PTR(-EPROBE_DEFER);
out:
mutex_unlock(&extcon_dev_list_lock);
return sd;
diff --git a/drivers/power/supply/axp288_charger.c b/drivers/power/supply/axp288_charger.c
index 735658ee1c60..8558577fccf5 100644
--- a/drivers/power/supply/axp288_charger.c
+++ b/drivers/power/supply/axp288_charger.c
@@ -768,17 +768,17 @@ static int axp288_charger_probe(struct platform_device *pdev)
info->regmap_irqc = axp20x->regmap_irqc;

info->cable.edev = extcon_get_extcon_dev(AXP288_EXTCON_DEV_NAME);
- if (info->cable.edev == NULL) {
+ if (IS_ERR(info->cable.edev)) {
dev_dbg(&pdev->dev, "%s is not ready, probe deferred\n",
AXP288_EXTCON_DEV_NAME);
- return -EPROBE_DEFER;
+ return PTR_ERR(info->cable.edev);
}

if (acpi_dev_present(USB_HOST_EXTCON_HID, NULL, -1)) {
info->otg.cable = extcon_get_extcon_dev(USB_HOST_EXTCON_NAME);
- if (info->otg.cable == NULL) {
+ if (IS_ERR(info->otg.cable)) {
dev_dbg(dev, "EXTCON_USB_HOST is not ready, probe deferred\n");
- return -EPROBE_DEFER;
+ return PTR_ERR(info->otg.cable);
}
dev_info(&pdev->dev,
"Using " USB_HOST_EXTCON_HID " extcon for usb-id\n");
diff --git a/drivers/usb/phy/phy-omap-otg.c b/drivers/usb/phy/phy-omap-otg.c
index ee0863c6553e..605314ddcd3d 100644
--- a/drivers/usb/phy/phy-omap-otg.c
+++ b/drivers/usb/phy/phy-omap-otg.c
@@ -91,12 +91,12 @@ static int omap_otg_probe(struct platform_device *pdev)
int ret;
u32 rev;

- if (!config || !config->extcon)
+ if (!config)
return -ENODEV;

extcon = extcon_get_extcon_dev(config->extcon);
- if (!extcon)
- return -EPROBE_DEFER;
+ if (IS_ERR(extcon))
+ return PTR_ERR(extcon);

otg_dev = devm_kzalloc(&pdev->dev, sizeof(*otg_dev), GFP_KERNEL);
if (!otg_dev)
diff --git a/drivers/usb/typec/tcpm/fusb302.c b/drivers/usb/typec/tcpm/fusb302.c
index 43b64d9309d0..6d332066202b 100644
--- a/drivers/usb/typec/tcpm/fusb302.c
+++ b/drivers/usb/typec/tcpm/fusb302.c
@@ -1767,8 +1767,8 @@ static int fusb302_probe(struct i2c_client *client,
*/
if (device_property_read_string(dev, "fcs,extcon-name", &name) == 0) {
chip->extcon = extcon_get_extcon_dev(name);
- if (!chip->extcon)
- return -EPROBE_DEFER;
+ if (IS_ERR(chip->extcon))
+ return PTR_ERR(chip->extcon);
}

chip->vbus = devm_regulator_get(chip->dev, "vbus");
--
2.19.1