diff options
Diffstat (limited to 'drivers/usb/net/rndis_host.c')
| -rw-r--r-- | drivers/usb/net/rndis_host.c | 28 |
1 files changed, 21 insertions, 7 deletions
diff --git a/drivers/usb/net/rndis_host.c b/drivers/usb/net/rndis_host.c index 49991ac1bf3b..94ddfe16fdda 100644 --- a/drivers/usb/net/rndis_host.c +++ b/drivers/usb/net/rndis_host.c @@ -39,6 +39,20 @@ * RNDIS is NDIS remoted over USB. It's a MSFT variant of CDC ACM ... of * course ACM was intended for modems, not Ethernet links! USB's standard * for Ethernet links is "CDC Ethernet", which is significantly simpler. + * + * NOTE that Microsoft's "RNDIS 1.0" specification is incomplete. Issues + * include: + * - Power management in particular relies on information that's scattered + * through other documentation, and which is incomplete or incorrect even + * there. + * - There are various undocumented protocol requirements, such as the + * need to send unused garbage in control-OUT messages. + * - In some cases, MS-Windows will emit undocumented requests; this + * matters more to peripheral implementations than host ones. + * + * For these reasons and others, ** USE OF RNDIS IS STRONGLY DISCOURAGED ** in + * favor of such non-proprietary alternatives as CDC Ethernet or the newer (and + * currently rare) "Ethernet Emulation Model" (EEM). */ /* @@ -72,17 +86,17 @@ struct rndis_msg_hdr { */ #define RNDIS_MSG_PACKET ccpu2(0x00000001) /* 1-N packets */ #define RNDIS_MSG_INIT ccpu2(0x00000002) -#define RNDIS_MSG_INIT_C (RNDIS_MSG_INIT|RNDIS_MSG_COMPLETION) +#define RNDIS_MSG_INIT_C (RNDIS_MSG_INIT|RNDIS_MSG_COMPLETION) #define RNDIS_MSG_HALT ccpu2(0x00000003) #define RNDIS_MSG_QUERY ccpu2(0x00000004) -#define RNDIS_MSG_QUERY_C (RNDIS_MSG_QUERY|RNDIS_MSG_COMPLETION) +#define RNDIS_MSG_QUERY_C (RNDIS_MSG_QUERY|RNDIS_MSG_COMPLETION) #define RNDIS_MSG_SET ccpu2(0x00000005) -#define RNDIS_MSG_SET_C (RNDIS_MSG_SET|RNDIS_MSG_COMPLETION) +#define RNDIS_MSG_SET_C (RNDIS_MSG_SET|RNDIS_MSG_COMPLETION) #define RNDIS_MSG_RESET ccpu2(0x00000006) -#define RNDIS_MSG_RESET_C (RNDIS_MSG_RESET|RNDIS_MSG_COMPLETION) +#define RNDIS_MSG_RESET_C (RNDIS_MSG_RESET|RNDIS_MSG_COMPLETION) #define RNDIS_MSG_INDICATE ccpu2(0x00000007) #define RNDIS_MSG_KEEPALIVE ccpu2(0x00000008) -#define RNDIS_MSG_KEEPALIVE_C (RNDIS_MSG_KEEPALIVE|RNDIS_MSG_COMPLETION) +#define RNDIS_MSG_KEEPALIVE_C (RNDIS_MSG_KEEPALIVE|RNDIS_MSG_COMPLETION) /* codes for "status" field of completion messages */ #define RNDIS_STATUS_SUCCESS ccpu2(0x00000000) @@ -596,13 +610,13 @@ static struct usb_driver rndis_driver = { static int __init rndis_init(void) { - return usb_register(&rndis_driver); + return usb_register(&rndis_driver); } module_init(rndis_init); static void __exit rndis_exit(void) { - usb_deregister(&rndis_driver); + usb_deregister(&rndis_driver); } module_exit(rndis_exit); |