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UPSTREAM: usb: dwc3: drd: Defer probe if extcon device is not found

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In case the "linux,extcon-name" property is defined but device itself
is not ready, defer the probe.

Change-Id: I66ec092bb74d92aaf6ef687156713a15224a5caf
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: William Wu <william.wu@rock-chips.com>
(cherry picked from commit 98bba546e8)
This commit is contained in:
Andy Shevchenko 2019-02-18 15:26:31 +02:00 committed by Tao Huang
parent 6933711403
commit e980094b89
1 changed files with 7 additions and 2 deletions
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9
drivers/usb/dwc3/drd.c
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@ -457,8 +457,13 @@ static struct extcon_dev *dwc3_get_extcon(struct dwc3 *dwc)
* This device property is for kernel internal use only and
* is expected to be set by the glue code.
*/
if (device_property_read_string(dev, "linux,extcon-name", &name) == 0)
return extcon_get_extcon_dev(name);
if (device_property_read_string(dev, "linux,extcon-name", &name) == 0) {
edev = extcon_get_extcon_dev(name);
if (!edev)
return ERR_PTR(-EPROBE_DEFER);
return edev;
}
np_phy = of_parse_phandle(dev->of_node, "phys", 0);
np_conn = of_graph_get_remote_node(np_phy, -1, -1);