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3ebebccf89
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David S. Miller 3ebebccf89 [NIU]: Fix potentially stuck TCP socket send queues. 
It is possible for the TX ring to have packets sit in it for unbounded
amounts of time.

The only way to defer TX interrupts in the chip is to periodically set
"mark" bits, when processing of a TX descriptor with the mark bit set
is complete it triggers the interrupt for the TX queue's LDG.

A consequence of this kind of scheme is that if packet flow suddenly
stops, the remaining TX packets will just sit there.

If this happens, since those packets could be charged to TCP socket
send queues, such sockets could get stuck.

The simplest solution is to divorce the socket ownership of the packet
once the device takes the SKB, by using skb_orphan() in
niu_start_xmit().

In hindsight, it would have been much nicer if the chip provided two
interrupt sources for TX (like basically every other ethernet chip
does).  Namely, keep the "mark" bit, but also signal the LDG when the
TX queue becomes completely empty.  That way there is no need to have
a deadlock breaker like this.

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-08 23:29:56 -08:00
..
acorn/char
acpi Pull bugzilla-9362 into release branch 2007-12-14 15:14:52 -05:00
amba
ata pata_hpt37x: Fix HPT374 detection 2007-12-19 14:29:01 -08:00
atm [ATM]: Spelling fixes 2007-12-20 14:05:37 -08:00
auxdisplay
base create /sys/.../power when CONFIG_PM is set 2007-11-28 13:53:53 -08:00
block Cleanup umem driver: fix most checkpatch warnings, conform to kernel 2007-12-18 08:29:28 +01:00
bluetooth
cdrom SG: audit of drivers that use blk_rq_map_sg() 2007-10-24 13:21:21 +02:00
char pl2303: Fix mode switching regression 2008-01-08 16:16:34 -08:00
clocksource
connector [CONNECTOR]: Return proper error code in cn_call_callback() 2008-01-04 03:55:37 -08:00
cpufreq drivers/cpufreq/cpufreq_stats.c section fix 2007-12-17 19:28:16 -08:00
cpuidle cpuidle: remove unused exports 2007-10-29 17:27:50 -04:00
crypto Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2007-12-27 21:45:01 -08:00
dca
dio
dma I/OAT: fix null device in call to dev_err() 2007-12-17 19:28:17 -08:00
edac i5000_edac: no need to __stringify() KBUILD_BASENAME 2007-11-14 18:45:41 -08:00
eisa
firewire firewire: OHCI 1.0 Isochronous Receive support 2007-12-10 21:55:19 +01:00
firmware dmi-id: fix for __you_cannot_kmalloc_that_much failure 2008-01-08 16:10:36 -08:00
hid HID: Don't access input_dev->private directly 2007-10-31 13:30:35 +01:00
hwmon hwmon: (w83627ehf) Be more careful when changing VID input level 2008-01-03 07:33:31 -05:00
i2c i2c/isp1301_omap: Build fix 2007-12-12 13:45:25 +01:00
ide cmd64x: fix hwif->chipset setup 2007-12-24 15:23:44 +01:00
ieee1394 ieee1394: iso and async streams: s/g list fix 2007-11-04 14:31:16 +01:00
infiniband IB/srp: Release transport before removing host 2008-01-08 12:08:10 -08:00
input spi: use simplified spi_sync() calling convention 2007-12-05 09:21:19 -08:00
isdn [ISDN]: i4l: Fix DLE handling for i4l-audio 2008-01-04 03:55:44 -08:00
kvm KVM: SVM: Fix FPU leak while emulating clts 2007-11-27 15:38:18 +02:00
leds leds: Fix locomo LED driver oops 2007-12-31 23:11:11 +00:00
lguest virtio: fix module/device unloading 2007-11-19 11:20:42 +11:00
macintosh drivers/macintosh/via-pmu.c: Added a missing iounmap 2007-12-17 19:28:16 -08:00
mca
md md: fix data corruption when a degraded raid5 array is reshaped 2008-01-08 16:10:35 -08:00
media V4L/DVB (6916): ivtv: udelay has to be changed *after* the eeprom was read, not before 2008-01-07 06:46:26 -02:00
message i2o: debug messages corrected 2007-11-05 15:12:31 -08:00
mfd MFD: SM501 debug typo fix 2007-11-29 09:24:53 -08:00
misc ACPI: thinkpad-acpi: fix lenovo keymap for brightness 2007-12-13 21:59:59 -05:00
mmc sdhci: support JMicron JMB38x chips 2007-12-12 20:01:00 +01:00
mtd Eliminate pointless casts from void* in a few driver irq handlers. 2007-10-23 19:53:16 -04:00
net [NIU]: Fix potentially stuck TCP socket send queues. 2008-01-08 23:29:56 -08:00
nubus
of
oprofile oProfile: oops when profile_pc() returns ~0LU 2007-11-14 18:45:37 -08:00
parisc [PARISC] lba_pci: pci_claim_resources disabled expansion roms 2007-12-06 09:38:26 -08:00
parport parport: "dev->timeslice" is an unsigned long, not an int 2007-12-17 19:28:15 -08:00
pci [PCI] Do not enable CRS Software Visibility by default 2007-12-27 21:21:36 -08:00
pcmcia pcmcia: remove pxa2xx_lubbock build warning 2007-12-23 12:54:37 -08:00
pnp drivers/pnp/resource.c: Add missing pci_dev_put 2007-11-29 09:24:52 -08:00
power
ps3 ps3: vuart: fix error path locking 2007-12-23 12:54:37 -08:00
rapidio
rtc rtc-at32ap700x: fix irq init oops 2007-12-17 19:28:15 -08:00
s390 [S390]: Fix use of skb after netif_rx 2007-12-11 02:45:29 -08:00
sbus [WATCHDOG] Sbus: cpwatchdog, remove SPIN_LOCK_UNLOCKED 2007-11-19 21:09:52 +00:00
scsi Revert "scsi: revert "[SCSI] Get rid of scsi_cmnd->done"" 2008-01-06 10:17:12 -08:00
serial [SERIAL]: Fix section mismatches in Sun serial console drivers. 2007-12-29 01:19:49 -08:00
sh superhyway: Handle device_register() retval properly. 2007-11-07 11:13:55 +09:00
sn
spi spi_bitbang: always grab lock with irqs blocked 2008-01-08 16:10:35 -08:00
ssb ssb: Fix PCMCIA-host lowlevel bus access 2007-11-10 22:01:53 -08:00
tc
telephony telephony: phonedev panics if unregistering device not registered [Bug 9266] 2007-11-05 15:12:33 -08:00
uio
usb pl2303: Fix mode switching regression 2008-01-08 16:16:34 -08:00
video ps3fb: Fix ps3fb free_irq() dev_id 2007-12-19 14:27:30 -08:00
virtio virtio: fix module/device unloading 2007-11-19 11:20:42 +11:00
w1 W1: fix memset size error 2007-11-14 18:45:36 -08:00
watchdog [WATCHDOG] add Nano 7240 driver 2007-12-04 16:48:06 +00:00
xen
zorro Amiga zorro bus: Add missing zorro_device_remove() 2007-11-26 19:15:31 -08:00
Kconfig Virtio interface 2007-10-23 15:49:54 +10:00
Makefile Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2007-10-23 16:37:29 -07:00