diff options
| author | Michael Brown <mcb30@ipxe.org> | 2020-10-30 13:51:30 +0000 |
|---|---|---|
| committer | Michael Brown <mcb30@ipxe.org> | 2020-10-30 13:54:55 +0000 |
| commit | 16873703ddea2d64fac1809967ef5198b8764baa (patch) | |
| tree | 0e82a7b1d7719cfebaa6649406804ab99524738e /src/include | |
| parent | e5e2f3fba840267118bf72c8093c673f056ffdc9 (diff) | |
| download | ipxe-16873703ddea2d64fac1809967ef5198b8764baa.tar.gz | |
[efi] Avoid dragging in USB subsystem via efi_usb_path()
Commit 87e39a9c9 ("[efi] Split efi_usb_path() out to a separate
function") unintentionally introduced an undefined symbol reference
from efi_path.o to usb_depth(), causing the USB subsystem to become a
dependency of all EFI builds.
Fix by converting usb_depth() to a static inline function.
Reported-by: Pico Mitchell <pico@randomapplications.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/ipxe/usb.h | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/src/include/ipxe/usb.h b/src/include/ipxe/usb.h index f41f4c355..911247ede 100644 --- a/src/include/ipxe/usb.h +++ b/src/include/ipxe/usb.h @@ -1239,6 +1239,23 @@ usb_set_interface ( struct usb_device *usb, unsigned int interface, NULL, 0 ); } +/** + * Get USB depth + * + * @v usb USB device + * @ret depth Hub depth + */ +static inline unsigned int usb_depth ( struct usb_device *usb ) { + struct usb_device *parent; + unsigned int depth; + + /* Navigate up to root hub, constructing depth as we go */ + for ( depth = 0 ; ( parent = usb->port->hub->usb ) ; usb = parent ) + depth++; + + return depth; +} + extern struct list_head usb_buses; extern struct usb_interface_descriptor * @@ -1274,7 +1291,6 @@ extern struct usb_bus * find_usb_bus_by_location ( unsigned int bus_type, extern int usb_alloc_address ( struct usb_bus *bus ); extern void usb_free_address ( struct usb_bus *bus, unsigned int address ); extern unsigned int usb_route_string ( struct usb_device *usb ); -extern unsigned int usb_depth ( struct usb_device *usb ); extern struct usb_port * usb_root_hub_port ( struct usb_device *usb ); extern struct usb_port * usb_transaction_translator ( struct usb_device *usb ); |