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| author | Haiyang Zhang <haiyangz@microsoft.com> | 2012-10-02 05:30:24 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-10-02 14:39:31 -0400 |
| commit | a3a6cab5ea10cca64d036851fe0d932448f2fe4f (patch) | |
| tree | 2b8c84eed31e455fef949bf5a47602e7f982514b | |
| parent | 63f6921d300c6fbdca3d0e73dcc24b4e5e4dced2 (diff) | |
| download | lwn-a3a6cab5ea10cca64d036851fe0d932448f2fe4f.tar.gz lwn-a3a6cab5ea10cca64d036851fe0d932448f2fe4f.zip | |
hyperv: Add buffer for extended info after the RNDIS response message.
In some response messages, there may be some extended info after the
message.
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/hyperv/rndis_filter.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c index e7e12cfbbf37..928148cc3220 100644 --- a/drivers/net/hyperv/rndis_filter.c +++ b/drivers/net/hyperv/rndis_filter.c @@ -32,16 +32,19 @@ #include "hyperv_net.h" +#define RNDIS_EXT_LEN 100 struct rndis_request { struct list_head list_ent; struct completion wait_event; + struct rndis_message response_msg; /* - * FIXME: We assumed a fixed size response here. If we do ever need to - * handle a bigger response, we can either define a max response - * message or add a response buffer variable above this field + * The buffer for extended info after the RNDIS response message. It's + * referenced based on the data offset in the RNDIS message. Its size + * is enough for current needs, and should be sufficient for the near + * future. */ - struct rndis_message response_msg; + u8 response_ext[RNDIS_EXT_LEN]; /* Simplify allocation by having a netvsc packet inline */ struct hv_netvsc_packet pkt; @@ -50,12 +53,10 @@ struct rndis_request { struct rndis_message request_msg; /* - * The buffer for the extended info after the RNDIS message. It's - * referenced based on the data offset in the RNDIS message. Its size - * is enough for current needs, and should be sufficient for the near - * future. + * The buffer for the extended info after the RNDIS request message. + * It is referenced and sized in a similar way as response_ext. */ - u8 ext[100]; + u8 request_ext[RNDIS_EXT_LEN]; }; static void rndis_filter_send_completion(void *ctx); @@ -274,7 +275,8 @@ static void rndis_filter_receive_response(struct rndis_device *dev, spin_unlock_irqrestore(&dev->request_lock, flags); if (found) { - if (resp->msg_len <= sizeof(struct rndis_message)) { + if (resp->msg_len <= + sizeof(struct rndis_message) + RNDIS_EXT_LEN) { memcpy(&request->response_msg, resp, resp->msg_len); } else { |