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[usb] Maintain a list of all USB buses

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2015-05-08 15:07:26 +01:00
parent f6604627ff
commit 5e1e2069fd
2 changed files with 18 additions and 0 deletions
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10
src/drivers/bus/usb.c
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@@ -40,6 +40,9 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
*
*/
/** List of USB buses */
struct list_head usb_buses = LIST_HEAD_INIT ( usb_buses );
/******************************************************************************
*
* Utility functions
@@ -1894,6 +1897,9 @@ int register_usb_bus ( struct usb_bus *bus ) {
if ( ( rc = bus->host->open ( bus ) ) != 0 )
goto err_open;
/* Add to list of USB buses */
list_add_tail ( &bus->list, &usb_buses );
/* Register root hub */
if ( ( rc = register_usb_hub ( bus->hub ) ) != 0 )
goto err_register_hub;
@@ -1905,6 +1911,7 @@ int register_usb_bus ( struct usb_bus *bus ) {
unregister_usb_hub ( bus->hub );
err_register_hub:
list_del ( &bus->list );
bus->host->close ( bus );
err_open:
return rc;
@@ -1927,6 +1934,9 @@ void unregister_usb_bus ( struct usb_bus *bus ) {
/* Unregister root hub */
unregister_usb_hub ( bus->hub );
/* Remove from list of USB buses */
list_del ( &bus->list );
/* Close bus */
bus->host->close ( bus );