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Sonic Zhang 4fcc3d3409 netdev:bfin_mac: reclaim and free tx skb as soon as possible after transfer 
SKBs hold onto resources that can't be held indefinitely, such as TCP
socket references and netfilter conntrack state.  So if a packet is left
in TX ring for a long time, there might be a TCP socket that cannot be
closed and freed up.

Current blackfin EMAC driver always reclaim and free used tx skbs in future
transfers. The problem is that future transfer may not come as soon as
possible. This patch start a timer after transfer to reclaim and free skb.
There is nearly no performance drop with this patch.

TX interrupt is not enabled because of a strange behavior of the Blackfin EMAC.
If EMAC TX transfer control is turned on, endless TX interrupts are triggered
no matter if TX DMA is enabled or not. Since DMA walks down the ring automatically,
TX transfer control can't be turned off in the middle. The only way is to disable
TX interrupt completely.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2010-06-15 15:04:10 -07:00
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accessibility
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acpi Merge branch 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6 2010-05-28 16:14:17 -07:00
amba
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ata libata: implement dump_id force param 2010-05-25 19:41:19 -04:00
atm atm: [he] rewrite buffer handling in receive path 2010-05-31 00:27:47 -07:00
auxdisplay auxdisplay: section cleanup in cfag12864bfb driver 2010-05-25 08:07:09 -07:00
base topology: convert cpu notifier to return encapsulate errno value 2010-05-27 09:12:48 -07:00
block Merge remote branch 'origin' into secretlab/next-devicetree 2010-05-22 00:36:56 -06:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2010-05-20 21:04:44 -07:00
cdrom of: Always use 'struct device.of_node' to get device node pointer. 2010-05-18 16:10:44 -06:00
char drop unused dentry argument to ->fsync 2010-05-27 22:05:02 -04:00
clocksource Merge branch 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2010-05-19 17:10:57 -07:00
connector
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cpufreq Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2010-05-18 08:49:13 -07:00
cpuidle Merge branch 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6 2010-05-28 16:14:17 -07:00
crypto Merge remote branch 'origin' into secretlab/next-devicetree 2010-05-22 00:36:56 -06:00
dca
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dio
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dma Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx 2010-05-30 09:12:43 -07:00
edac drivers/edac: convert logging messages direct uses of __FILE__ to %s, __FILE 2010-05-27 09:12:52 -07:00
eisa
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firewire Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2010-05-27 10:22:06 -07:00
firmware sysfs: add struct file* to bin_attr callbacks 2010-05-21 09:37:31 -07:00
gpio gpio: Fix inverted rdc321x gpio data out registers 2010-05-28 01:37:59 +02:00
gpu Merge branch 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2010-05-28 16:14:40 -07:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2010-05-27 09:19:55 -07:00
hwmon hwmon: (lm75) Add support for the Texas Instruments TMP105 2010-05-27 19:59:03 +02:00
i2c Merge remote branch 'origin' into secretlab/next-devicetree 2010-05-22 00:36:56 -06:00
ide m68k: amiga - Amiga Gayle IDE platform device conversion 2010-05-26 19:51:09 +02:00
idle intel_idle: native hardware cpuidle driver for latest Intel processors 2010-05-28 14:26:20 -04:00
ieee1394 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2010-05-27 10:22:06 -07:00
ieee802154
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infiniband net-next: remove useless union keyword 2010-06-10 23:31:35 -07:00
input input: Touchscreen driver for TPS6507x 2010-05-28 01:37:38 +02:00
isdn Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-06-06 17:42:02 -07:00
leds leds: Fix leds-gpio openfirmware compile issue 2010-05-28 08:35:27 +01:00
lguest
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macintosh Merge branch 'bkl/ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing 2010-05-24 08:01:10 -07:00
mca
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md md: convert cpu notifier to return encapsulate errno value 2010-05-27 09:12:48 -07:00
media Merge branch 'bkl/ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing 2010-05-24 08:01:10 -07:00
memstick
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message drivers/message/i2o/i2o_config.c: use memdup_user 2010-05-27 09:12:41 -07:00
mfd mfd: Rename twl5031 sih modules 2010-05-28 01:38:02 +02:00
misc lktdm: add support for hardlockup, softlockup and hung task crashes 2010-05-27 09:12:54 -07:00
mmc drivers/mmc/host: use ERR_CAST 2010-05-27 09:12:40 -07:00
mtd drop unused dentry argument to ->fsync 2010-05-27 22:05:02 -04:00
net netdev:bfin_mac: reclaim and free tx skb as soon as possible after transfer 2010-06-15 15:04:10 -07:00
nubus
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of Merge remote branch 'origin' into secretlab/next-devicetree 2010-05-22 00:36:56 -06:00
oprofile
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parisc
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parport m68k: amiga - Parallel port platform device conversion 2010-05-26 19:51:09 +02:00
pci Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 2010-05-28 14:42:18 -07:00
pcmcia Merge branch 'bkl/ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing 2010-05-24 08:01:10 -07:00
platform Move N014, N051 and CR620 dmi information to load scm dmi table 2010-05-20 10:16:13 -04:00
pnp
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power Merge git://git.infradead.org/battery-2.6 2010-05-25 08:16:34 -07:00
pps
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ps3
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rapidio rapidio: fix new kernel-doc warnings 2010-05-30 09:02:47 -07:00
regulator mfd: AB3100 register access change to abx500 API 2010-05-28 01:37:45 +02:00
rtc mfd: AB3100 register access change to abx500 API 2010-05-28 01:37:45 +02:00
s390 [S390] dasd: unit check handling during internal cio I/O 2010-05-26 23:27:09 +02:00
sbus Merge branch 'bkl/ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing 2010-05-24 08:01:10 -07:00
scsi net-next: remove useless union keyword 2010-06-10 23:31:35 -07:00
serial ARM: S5PV210: serial: Fix section mismatch warning 2010-05-28 19:40:05 +09:00
sfi SFI: add sysfs interface for SFI tables. 2010-05-27 12:46:20 -04:00
sh
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sn
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spi spi/xilinx: Fix compile error 2010-05-25 00:48:24 -06:00
ssb ssb: remove the ssb DMA API 2010-06-04 16:00:42 -04:00
staging bridge: use rx_handler_data pointer to store net_bridge_port pointer 2010-06-15 11:48:58 -07:00
tc
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telephony drivers/telephony/ixj.c: use memdup_user 2010-05-27 09:12:42 -07:00
thermal
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uio
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usb drop unused dentry argument to ->fsync 2010-05-27 22:05:02 -04:00
uwb
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vhost Merge branch 'vhost-net-next' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost 2010-06-02 08:26:36 -07:00
video drop unused dentry argument to ->fsync 2010-05-27 22:05:02 -04:00
virtio Merge branch 'virtio' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus 2010-05-21 17:22:52 -07:00
vlynq
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w1 sysfs: add struct file* to bin_attr callbacks 2010-05-21 09:37:31 -07:00
watchdog mfd: Change rdc321x resources flags to IORESOURCE_IO 2010-05-28 01:37:52 +02:00
xen xen: fix build when SYSRQ is disabled 2010-05-25 08:07:07 -07:00
zorro sysfs: add struct file* to bin_attr callbacks 2010-05-21 09:37:31 -07:00
Kconfig
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Makefile intel_idle: native hardware cpuidle driver for latest Intel processors 2010-05-28 14:26:20 -04:00