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[3.16.y-ckt,stable] Patch "usbnet: Fix tx_packets stat for FLAG_MULTI_FRAME drivers" has been added to staging queue

Message ID 1430221282-10713-1-git-send-email-luis.henriques@canonical.com
State New
Headers show

Commit Message

Luis Henriques April 28, 2015, 11:41 a.m. UTC
This is a note to let you know that I have just added a patch titled

    usbnet: Fix tx_packets stat for FLAG_MULTI_FRAME drivers

to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.16.y-queue

This patch is scheduled to be released in version 3.16.7-ckt11.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.16.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

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From 7d2237ad7d172dcca04c68378fdfe571d0aaff12 Mon Sep 17 00:00:00 2001
From: Ben Hutchings <ben.hutchings@codethink.co.uk>
Date: Thu, 26 Feb 2015 19:34:37 +0000
Subject: usbnet: Fix tx_packets stat for FLAG_MULTI_FRAME drivers
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

commit 1e9e39f4a29857a396ac7b669d109f697f66695e upstream.

Currently the usbnet core does not update the tx_packets statistic for
drivers with FLAG_MULTI_PACKET and there is no hook in the TX
completion path where they could do this.

cdc_ncm and dependent drivers are bumping tx_packets stat on the
transmit path while asix and sr9800 aren't updating it at all.

Add a packet count in struct skb_data so these drivers can fill it
in, initialise it to 1 for other drivers, and add the packet count
to the tx_packets statistic on completion.

Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Tested-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/net/usb/asix_common.c |  2 ++
 drivers/net/usb/cdc_ncm.c     |  3 ++-
 drivers/net/usb/sr9800.c      |  1 +
 drivers/net/usb/usbnet.c      |  5 +++--
 include/linux/usb/usbnet.h    | 12 ++++++++++++
 5 files changed, 20 insertions(+), 3 deletions(-)
diff mbox

Patch

diff --git a/drivers/net/usb/asix_common.c b/drivers/net/usb/asix_common.c
index 5c55f11572ba..724a9b50df7a 100644
--- a/drivers/net/usb/asix_common.c
+++ b/drivers/net/usb/asix_common.c
@@ -188,6 +188,8 @@  struct sk_buff *asix_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
 		memcpy(skb_tail_pointer(skb), &padbytes, sizeof(padbytes));
 		skb_put(skb, sizeof(padbytes));
 	}
+
+	usbnet_set_skb_tx_stats(skb, 1);
 	return skb;
 }

diff --git a/drivers/net/usb/cdc_ncm.c b/drivers/net/usb/cdc_ncm.c
index 80a844e0ae03..70cbea551139 100644
--- a/drivers/net/usb/cdc_ncm.c
+++ b/drivers/net/usb/cdc_ncm.c
@@ -1172,7 +1172,6 @@  cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign)

 	/* return skb */
 	ctx->tx_curr_skb = NULL;
-	dev->net->stats.tx_packets += ctx->tx_curr_frame_num;

 	/* keep private stats: framing overhead and number of NTBs */
 	ctx->tx_overhead += skb_out->len - ctx->tx_curr_frame_payload;
@@ -1184,6 +1183,8 @@  cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign)
 	 */
 	dev->net->stats.tx_bytes -= skb_out->len - ctx->tx_curr_frame_payload;

+	usbnet_set_skb_tx_stats(skb_out, n);
+
 	return skb_out;

 exit_no_skb:
diff --git a/drivers/net/usb/sr9800.c b/drivers/net/usb/sr9800.c
index b94a0fbb8b3b..7650cdc8fe6b 100644
--- a/drivers/net/usb/sr9800.c
+++ b/drivers/net/usb/sr9800.c
@@ -144,6 +144,7 @@  static struct sk_buff *sr_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
 		skb_put(skb, sizeof(padbytes));
 	}

+	usbnet_set_skb_tx_stats(skb, 1);
 	return skb;
 }

diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c
index f9e96c427558..3243b91c67b2 100644
--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c
@@ -1169,8 +1169,7 @@  static void tx_complete (struct urb *urb)
 	struct usbnet		*dev = entry->dev;

 	if (urb->status == 0) {
-		if (!(dev->driver_info->flags & FLAG_MULTI_PACKET))
-			dev->net->stats.tx_packets++;
+		dev->net->stats.tx_packets += entry->packets;
 		dev->net->stats.tx_bytes += entry->length;
 	} else {
 		dev->net->stats.tx_errors++;
@@ -1324,6 +1323,8 @@  netdev_tx_t usbnet_start_xmit (struct sk_buff *skb,
 			urb->transfer_flags |= URB_ZERO_PACKET;
 	}
 	entry->length = urb->transfer_buffer_length = length;
+	if (!(info->flags & FLAG_MULTI_PACKET))
+		usbnet_set_skb_tx_stats(skb, 1);

 	spin_lock_irqsave(&dev->txq.lock, flags);
 	retval = usb_autopm_get_interface_async(dev->intf);
diff --git a/include/linux/usb/usbnet.h b/include/linux/usb/usbnet.h
index 0662e98fef72..539eea72129c 100644
--- a/include/linux/usb/usbnet.h
+++ b/include/linux/usb/usbnet.h
@@ -221,8 +221,20 @@  struct skb_data {	/* skb->cb is one of these */
 	struct usbnet		*dev;
 	enum skb_state		state;
 	size_t			length;
+	unsigned long		packets;
 };

+/* Drivers that set FLAG_MULTI_PACKET must call this in their
+ * tx_fixup method before returning an skb.
+ */
+static inline void
+usbnet_set_skb_tx_stats(struct sk_buff *skb, unsigned long packets)
+{
+	struct skb_data *entry = (struct skb_data *) skb->cb;
+
+	entry->packets = packets;
+}
+
 extern int usbnet_open(struct net_device *net);
 extern int usbnet_stop(struct net_device *net);
 extern netdev_tx_t usbnet_start_xmit(struct sk_buff *skb,