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dm: usb: Adjust usb_alloc_new_device() to return an error

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This function returns NULL on error at present. Adjust it so that we can
return a real error, as is needed with driver model. Also improve the
error handling in its caller, usb_hub_port_connect_change(), and adjust
the code order to prepare for driver model.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Marek Vasut <marex@denx.de>
This commit is contained in:
Simon Glass
2015-03-25 12:22:01 -06:00
parent cad4291cd0
commit 79b5888729
3 changed files with 53 additions and 27 deletions
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20
include/usb.h
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@@ -703,10 +703,26 @@ void usb_hub_reset(void);
int hub_port_reset(struct usb_device *dev, int port,
unsigned short *portstat);
struct usb_device *usb_alloc_new_device(void *controller);
/**
* usb_alloc_new_device() - Allocate a new device
*
* @devp: returns a pointer of a new device structure. With driver model this
* is a device pointer, but with legacy USB this pointer is
* driver-specific.
* @return 0 if OK, -ENOSPC if we have found out of room for new devices
*/
int usb_alloc_new_device(struct udevice *controller, struct usb_device **devp);
/**
* usb_free_device() - Free a partially-inited device
*
* This is an internal function. It is used to reverse the action of
* usb_alloc_new_device() when we hit a problem during init.
*/
void usb_free_device(struct udevice *controller);
int usb_new_device(struct usb_device *dev);
void usb_free_device(void);
int usb_alloc_device(struct usb_device *dev);
#endif /*_USB_H_ */