[PATCH net, 1/3] hyperv: Fix the max_xfer_size in RNDIS initialization

[PATCH net, 1/3] hyperv: Fix the max_xfer_size in RNDIS initialization

[Haiyang Zhang]

According to RNDIS specs, Windows sets this size to
0x4000. I use the same value here.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: K. Y. Srinivasan <kys@microsoft.com>

---
 drivers/net/hyperv/rndis_filter.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c
index 1e88a10..3cb7486 100644
--- a/drivers/net/hyperv/rndis_filter.c
+++ b/drivers/net/hyperv/rndis_filter.c
@@ -678,8 +678,7 @@ static int rndis_filter_init_device(struct rndis_device *dev)
 	init = &request->request_msg.msg.init_req;
 	init->major_ver = RNDIS_MAJOR_VERSION;
 	init->minor_ver = RNDIS_MINOR_VERSION;
-	/* FIXME: Use 1536 - rounded ethernet frame size */
-	init->max_xfer_size = 2048;
+	init->max_xfer_size = 0x4000;
 
 	dev->state = RNDIS_DEV_INITIALIZING;
 
-- 
1.7.4.1

[PATCH net, 2/3] hyperv: Fix the missing return value in rndis_filter_set_packet_filter()

[Haiyang Zhang]

Return ETIMEDOUT when the reply message is not received in time.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: K. Y. Srinivasan <kys@microsoft.com>

---
 drivers/net/hyperv/rndis_filter.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c
index 3cb7486..2909dd8 100644
--- a/drivers/net/hyperv/rndis_filter.c
+++ b/drivers/net/hyperv/rndis_filter.c
@@ -641,6 +641,7 @@ int rndis_filter_set_packet_filter(struct rndis_device *dev, u32 new_filter)
 	if (t == 0) {
 		netdev_err(ndev,
 			"timeout before we got a set response...\n");
+		ret = -ETIMEDOUT;
 		/*
 		 * We can't deallocate the request since we may still receive a
 		 * send completion for it.
-- 
1.7.4.1

[PATCH net, 3/3] hyperv: Fix page buffer handling in rndis_filter_send_request()

[Haiyang Zhang]

Add another page buffer if the request message crossed page boundary.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: K. Y. Srinivasan <kys@microsoft.com>

---
 drivers/net/hyperv/rndis_filter.c |   16 +++++++++++++++-
 1 files changed, 15 insertions(+), 1 deletions(-)

diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c
index 2909dd8..1cd8d45 100644
--- a/drivers/net/hyperv/rndis_filter.c
+++ b/drivers/net/hyperv/rndis_filter.c
@@ -45,7 +45,9 @@ struct rndis_request {
 
 	/* Simplify allocation by having a netvsc packet inline */
 	struct hv_netvsc_packet	pkt;
-	struct hv_page_buffer buf;
+	/* Set 2 pages for rndis requests crossing page boundary */
+	struct hv_page_buffer buf[2];
+
 	/* FIXME: We assumed a fixed size request here. */
 	struct rndis_message request_msg;
 	u8 ext[100];
@@ -221,6 +223,18 @@ static int rndis_filter_send_request(struct rndis_device *dev,
 	packet->page_buf[0].offset =
 		(unsigned long)&req->request_msg & (PAGE_SIZE - 1);
 
+	/* Add one page_buf when request_msg crossing page boundary */
+	if (packet->page_buf[0].offset + packet->page_buf[0].len > PAGE_SIZE) {
+		packet->page_buf_cnt++;
+		packet->page_buf[0].len = PAGE_SIZE -
+			packet->page_buf[0].offset;
+		packet->page_buf[1].pfn = virt_to_phys((void *)&req->request_msg
+			+ packet->page_buf[0].len) >> PAGE_SHIFT;
+		packet->page_buf[1].offset = 0;
+		packet->page_buf[1].len = req->request_msg.msg_len -
+			packet->page_buf[0].len;
+	}
+
 	packet->completion.send.send_completion_ctx = req;/* packet; */
 	packet->completion.send.send_completion =
 		rndis_filter_send_request_completion;
-- 
1.7.4.1

Re: [PATCH net,1/3] hyperv: Fix the max_xfer_size in RNDIS initialization

[David Miller]

These patches do not apply cleanly to the current net-next tree
which is the only place where patches should be targetted right
now.

RE: [PATCH net,1/3] hyperv: Fix the max_xfer_size in RNDIS initialization

[Haiyang Zhang]

________________________________________
> From: David Miller [davem@davemloft.net]
> Sent: Monday, October 01, 2012 6:39 PM
> To: Haiyang Zhang
> Cc: netdev@vger.kernel.org; KY Srinivasan; olaf@aepfle.de; jasowang@redhat.com; linux-kernel@vger.kernel.org; devel@linuxdriverproject.org
> Subject: Re: [PATCH net,1/3] hyperv: Fix the max_xfer_size in RNDIS initialization

> These patches do not apply cleanly to the current net-next tree
> which is the only place where patches should be targetted right
> now.

I will rebase the patch set to the net-next tree soon.

Thanks,
- Haiyang

Re: [PATCH net, 3/3] hyperv: Fix page buffer handling in rndis_filter_send_request()

[Dan Carpenter]

On Mon, Oct 01, 2012 at 03:30:57PM -0700, Haiyang Zhang wrote:
> Add another page buffer if the request message crossed page boundary.
> 

What are the user visible effects of this bug fix?  Please put that
in the commit message.

regards,
dan carpenter

RE: [PATCH net, 3/3] hyperv: Fix page buffer handling in rndis_filter_send_request()

[Haiyang Zhang]

> -----Original Message-----
> From: Dan Carpenter [mailto:dan.carpenter@oracle.com]
> Sent: Tuesday, October 02, 2012 4:39 AM
> To: Haiyang Zhang
> Cc: davem@davemloft.net; netdev@vger.kernel.org; olaf@aepfle.de;
> jasowang@redhat.com; linux-kernel@vger.kernel.org;
> devel@linuxdriverproject.org
> Subject: Re: [PATCH net, 3/3] hyperv: Fix page buffer handling in
> rndis_filter_send_request()
> 
> On Mon, Oct 01, 2012 at 03:30:57PM -0700, Haiyang Zhang wrote:
> > Add another page buffer if the request message crossed page boundary.
> >
> 
> What are the user visible effects of this bug fix?  Please put that
> in the commit message.

Will do.

Thanks,
- Haiyang