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usb: phy: Fix deferred probing

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Commit 1290a958d4 ("usb: phy: propagate __of_usb_find_phy()'s error on
failure") actually broke the deferred probing mechanism, since it now returns
EPROBE_DEFER only when the try_module_get call fails, but not when the phy
lookup does.

All the other similar functions seem to return ENODEV when try_module_get
fails, and the error code of either __usb_find_phy or __of_usb_find_phy
otherwise.

In order to have a consistent behaviour, and a meaningful EPROBE_DEFER, always
return EPROBE_DEFER when __(of_)usb_find_phy fails to look up the requested
phy, that will be propagated by the caller, and ENODEV if try_module_get fails.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Tested-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Maxime Ripard 2015-01-06 16:45:07 +01:00 • committed by Greg Kroah-Hartman
commit 9c9d82492b
1 changed files with 3 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

6
drivers/usb/phy/phy.c
View file

@ -34,7 +34,7 @@ static struct usb_phy *__usb_find_phy(struct list_head *list,
return phy;
}
return ERR_PTR(-ENODEV);
return ERR_PTR(-EPROBE_DEFER);
}
static struct usb_phy *__usb_find_phy_dev(struct device *dev,
@ -66,7 +66,7 @@ static struct usb_phy *__of_usb_find_phy(struct device_node *node)
return phy;
}
return ERR_PTR(-ENODEV);
return ERR_PTR(-EPROBE_DEFER);
}
static void devm_usb_phy_release(struct device *dev, void *res)
@ -192,7 +192,7 @@ struct usb_phy *devm_usb_get_phy_by_phandle(struct device *dev,
phy = __of_usb_find_phy(node);
if (IS_ERR(phy) || !try_module_get(phy->dev->driver->owner)) {
if (!IS_ERR(phy))
phy = ERR_PTR(-EPROBE_DEFER);
phy = ERR_PTR(-ENODEV);
devres_free(ptr);
goto err1;