From 1ae5dc342ac78d7a42965fd1f323815f6f5ef2c1 Mon Sep 17 00:00:00 2001
From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Mon, 10 May 2010 05:01:31 -0700
Subject: net: trans_start cleanups
Now that core network takes care of trans_start updates, dont do it
in drivers themselves, if possible. Drivers can avoid one cache miss
(on dev->trans_start) in their start_xmit() handler.
Exceptions are NETIF_F_LLTX drivers
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/usb/pegasus.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
(limited to 'drivers/net/usb/pegasus.c')
diff --git a/drivers/net/usb/pegasus.c b/drivers/net/usb/pegasus.c
index 41838773b568..1cd17d274a12 100644
--- a/drivers/net/usb/pegasus.c
+++ b/drivers/net/usb/pegasus.c
@@ -808,7 +808,7 @@ static void write_bulk_callback(struct urb *urb)
break;
}
- net->trans_start = jiffies;
+ net->trans_start = jiffies; /* prevent tx timeout */
netif_wake_queue(net);
}
@@ -909,7 +909,6 @@ static netdev_tx_t pegasus_start_xmit(struct sk_buff *skb,
} else {
pegasus->stats.tx_packets++;
pegasus->stats.tx_bytes += skb->len;
- net->trans_start = jiffies;
}
dev_kfree_skb(skb);
--
cgit v1.2.3
From 175c04414106c34f0130d8d3bf152825b4829ceb Mon Sep 17 00:00:00 2001
From: Julia Lawall <julia@diku.dk>
Date: Sat, 15 May 2010 11:18:58 +0000
Subject: drivers/net/usb: Use kmemdup
Use kmemdup when some other buffer is immediately copied into the
allocated region.
A simplified version of the semantic patch that makes this change is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@@
expression from,to,size,flag;
statement S;
@@
- to = \(kmalloc\|kzalloc\)(size,flag);
+ to = kmemdup(from,size,flag);
if (to==NULL || ...) S
- memcpy(to, from, size);
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/usb/pegasus.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
(limited to 'drivers/net/usb/pegasus.c')
diff --git a/drivers/net/usb/pegasus.c b/drivers/net/usb/pegasus.c
index 1cd17d274a12..974d17f0263e 100644
--- a/drivers/net/usb/pegasus.c
+++ b/drivers/net/usb/pegasus.c
@@ -203,13 +203,12 @@ static int set_registers(pegasus_t * pegasus, __u16 indx, __u16 size,
char *buffer;
DECLARE_WAITQUEUE(wait, current);
- buffer = kmalloc(size, GFP_KERNEL);
+ buffer = kmemdup(data, size, GFP_KERNEL);
if (!buffer) {
netif_warn(pegasus, drv, pegasus->net,
"out of memory in %s\n", __func__);
return -ENOMEM;
}
- memcpy(buffer, data, size);
add_wait_queue(&pegasus->ctrl_wait, &wait);
set_current_state(TASK_UNINTERRUPTIBLE);
@@ -255,13 +254,12 @@ static int set_register(pegasus_t * pegasus, __u16 indx, __u8 data)
char *tmp;
DECLARE_WAITQUEUE(wait, current);
- tmp = kmalloc(1, GFP_KERNEL);
+ tmp = kmemdup(&data, 1, GFP_KERNEL);
if (!tmp) {
netif_warn(pegasus, drv, pegasus->net,
"out of memory in %s\n", __func__);
return -ENOMEM;
}
- memcpy(tmp, &data, 1);
add_wait_queue(&pegasus->ctrl_wait, &wait);
set_current_state(TASK_UNINTERRUPTIBLE);
while (pegasus->flags & ETH_REGS_CHANGED)
--
cgit v1.2.3