In some response messages, there may be some extended info after the
message.
Signed-off-by: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>
Reviewed-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx>
---
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 e7e12cf..928148c 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 {
--
1.7.4.1
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