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Ingo Molnar b57bd06655 [PATCH] net, 8139too.c: fix netpoll deadlock 
fix deadlock in the 8139too driver: poll handlers should never forcibly
enable local interrupts, because they might be used by netpoll/printk
from IRQ context.

  =================================
  [ INFO: inconsistent lock state ]
  2.6.19 #11
  ---------------------------------
  inconsistent {softirq-on-W} -> {in-softirq-W} usage.
  swapper/1 [HC0[0]:SC1[1]:HE1:SE0] takes:
   (&npinfo->poll_lock){-+..}, at: [<c0350a41>] net_rx_action+0x64/0x1de
  {softirq-on-W} state was registered at:
    [<c0134c86>] mark_lock+0x5b/0x39c
    [<c0135012>] mark_held_locks+0x4b/0x68
    [<c01351e9>] trace_hardirqs_on+0x115/0x139
    [<c02879e6>] rtl8139_poll+0x3d7/0x3f4
    [<c035c85d>] netpoll_poll+0x82/0x32f
    [<c035c775>] netpoll_send_skb+0xc9/0x12f
    [<c035cdcc>] netpoll_send_udp+0x253/0x25b
    [<c0288463>] write_msg+0x40/0x65
    [<c011cead>] __call_console_drivers+0x45/0x51
    [<c011cf16>] _call_console_drivers+0x5d/0x61
    [<c011d4fb>] release_console_sem+0x11f/0x1d8
    [<c011d7d7>] register_console+0x1ac/0x1b3
    [<c02883f8>] init_netconsole+0x55/0x67
    [<c010040c>] init+0x9a/0x24e
    [<c01049cf>] kernel_thread_helper+0x7/0x10
    [<ffffffff>] 0xffffffff
  irq event stamp: 819992
  hardirqs last  enabled at (819992): [<c0350a16>] net_rx_action+0x39/0x1de
  hardirqs last disabled at (819991): [<c0350b1e>] net_rx_action+0x141/0x1de
  softirqs last  enabled at (817552): [<c01214e4>] __do_softirq+0xa3/0xa8
  softirqs last disabled at (819987): [<c0106051>] do_softirq+0x5b/0xc9

  other info that might help us debug this:
  no locks held by swapper/1.

  stack backtrace:
   [<c0104d88>] dump_trace+0x63/0x1e8
   [<c0104f26>] show_trace_log_lvl+0x19/0x2e
   [<c010532d>] show_trace+0x12/0x14
   [<c0105343>] dump_stack+0x14/0x16
   [<c0134980>] print_usage_bug+0x23c/0x246
   [<c0134d33>] mark_lock+0x108/0x39c
   [<c01356a7>] __lock_acquire+0x361/0x9ed
   [<c0136018>] lock_acquire+0x56/0x72
   [<c03aff1f>] _spin_lock+0x35/0x42
   [<c0350a41>] net_rx_action+0x64/0x1de
   [<c0121493>] __do_softirq+0x52/0xa8
   [<c0106051>] do_softirq+0x5b/0xc9
   [<c0121338>] irq_exit+0x3c/0x48
   [<c0106163>] do_IRQ+0xa4/0xbd
   [<c01047c6>] common_interrupt+0x2e/0x34
   [<c011db92>] vprintk+0x2c0/0x309
   [<c011dbf6>] printk+0x1b/0x1d
   [<c01003f2>] init+0x80/0x24e
   [<c01049cf>] kernel_thread_helper+0x7/0x10
   =======================

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-12 08:10:44 -08:00
..
acorn IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
acpi Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2006-12-05 17:01:28 +00:00
amba [ARM] Fix __must_check warnings in drivers/bus/amba.c 2006-11-30 14:04:49 +00:00
ata [PATCH] libata: Incorrect timing computation for PIO5/6 2006-12-07 07:37:07 -05:00
atm [ATM]: Ignore generated file pca200e_ecd.bin2 2006-12-11 14:34:35 -08:00
base Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6 2006-12-07 08:59:11 -08:00
block [PATCH] struct path: convert nbd 2006-12-08 08:28:47 -08:00
bluetooth [PATCH] lockdep: annotate bcsp driver 2006-12-07 08:39:34 -08:00
cdrom [PATCH] drivers/cdrom/*: trivial vsnprintf() conversion 2006-12-07 08:39:35 -08:00
char [PATCH] sysctl: remove unused "context" param 2006-12-10 09:55:41 -08:00
clocksource [PATCH] clocksource: small cleanup 2006-12-10 09:57:22 -08:00
connector WorkStruct: make allyesconfig 2006-11-22 14:57:56 +00:00
cpufreq [PATCH] hotplug CPU: clean up hotcpu_notifier() use 2006-12-07 08:39:39 -08:00
crypto [PATCH] geode crypto is PCI device 2006-12-10 09:55:40 -08:00
dio
dma [PATCH] slab: remove SLAB_KERNEL 2006-12-07 08:39:24 -08:00
edac [PATCH] Add include/linux/freezer.h and move definitions from sched.h 2006-12-07 08:39:27 -08:00
eisa [PATCH] EISA: handle sysfs errors 2006-10-11 11:14:25 -07:00
fc4 [SCSI] fc4: Conversion to struct scsi_cmnd in fc4 2006-10-25 15:12:45 -07:00
firmware [PATCH] dell_rbu: fix error check 2006-11-16 11:43:38 -08:00
hid [PATCH] Generic HID layer - build 2006-12-08 10:43:20 -08:00
hwmon [PATCH] severing fs.h, radix-tree.h -> sched.h 2006-12-04 02:00:24 -05:00
i2c [PATCH] struct path: convert i2c-drivers 2006-12-08 08:28:45 -08:00
ide [PATCH] remove blk_queue_activity_fn 2006-12-12 10:22:23 +01:00
ieee1394 [PATCH] struct path: convert ieee1394 2006-12-08 08:28:46 -08:00
infiniband [PATCH] LOG2: Implement a general integer log2 facility in the kernel 2006-12-08 08:28:51 -08:00
input [PATCH] ucb1400_ts depends SND_AC97_BUS 2006-12-10 09:55:39 -08:00
isdn [PATCH] Don't build some broken ISDN drivers on big endian MIPS 2006-12-10 09:55:42 -08:00
kvm [PATCH] kvm: userspace interface 2006-12-10 09:57:22 -08:00
leds [PATCH] PCEngines WRAP LED Support 2006-12-07 08:39:36 -08:00
macintosh Merge rsync://rsync.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2006-12-08 01:07:56 -05:00
mca [PATCH] drivers/mca: handle sysfs errors 2006-10-11 11:14:25 -07:00
md [CRYPTO] dm-crypt: Select CRYPTO_CBC 2006-12-10 10:18:57 -08:00
media V4L/DVB (4954): Fix: On ia64, i2c adap->inb/adap->outb are wrongly evaluated 2006-12-12 07:37:09 -02:00
message [PATCH] kernel-doc: fix fusion and i2o docs 2006-12-07 08:39:40 -08:00
mfd [PATCH] Add include/linux/freezer.h and move definitions from sched.h 2006-12-07 08:39:27 -08:00
misc [PATCH] tifm: fix NULL ptr and style 2006-12-07 08:39:33 -08:00
mmc AT91 MMC update for 2.6.19 2006-12-11 12:43:35 +01:00
mtd [PATCH] slab: remove SLAB_KERNEL 2006-12-07 08:39:24 -08:00
net [PATCH] net, 8139too.c: fix netpoll deadlock 2006-12-12 08:10:44 -08:00
nubus
oprofile [PATCH] struct path: convert oprofile 2006-12-08 08:28:48 -08:00
parisc Fix misc .c/.h comment typos 2006-11-30 05:24:39 +01:00
parport [PATCH] Kconfig refactoring for better menu nesting 2006-12-10 09:55:39 -08:00
pci [PATCH] Kconfig refactoring for better menu nesting 2006-12-10 09:55:39 -08:00
pcmcia [PATCH] struct path: convert pcmcia 2006-12-08 08:28:48 -08:00
pnp [PATCH] struct path: convert isapnp 2006-12-08 08:28:46 -08:00
ps3 [POWERPC] ps3: Add vuart support 2006-12-11 13:49:53 +11:00
rapidio Fix several typos in drivers/ 2006-10-03 22:31:37 +02:00
rtc [PATCH] AT91RM9200 RTC 2006-12-10 09:55:40 -08:00
s390 Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6 2006-12-08 11:21:55 -08:00
sbus [PATCH] struct path: convert sbus 2006-12-08 08:28:49 -08:00
scsi [PATCH] Sun3 SCSI: Make sun3 scsi drivers compile/work again 2006-12-09 09:41:18 -08:00
serial [PATCH] Kconfig refactoring for better menu nesting 2006-12-10 09:55:39 -08:00
sh
sn [PATCH] ioc4: Enable build on non-SN2 2006-10-17 08:18:42 -07:00
spi [PATCH] spi: stabilize PIO mode transfers on PXA2xx systems 2006-12-10 09:55:40 -08:00
tc [PATCH] tty: switch to ktermios 2006-12-08 08:28:57 -08:00
telephony [PATCH] struct path: convert ixj 2006-12-08 08:28:46 -08:00
usb [PATCH] Generic HID layer - build 2006-12-08 10:43:20 -08:00
video [PATCH] Fbdev driver for IBM GXT4500P videocards 2006-12-10 09:57:20 -08:00
w1 [PATCH] better CONFIG_W1_SLAVE_DS2433_CRC handling 2006-12-07 08:39:43 -08:00
zorro [PATCH] struct path: convert zorro 2006-12-08 08:28:50 -08:00
Kconfig [PATCH] kvm: userspace interface 2006-12-10 09:57:22 -08:00
Makefile [PATCH] kvm: userspace interface 2006-12-10 09:57:22 -08:00