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linux-next/drivers
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Takamasa Ohtake 23d10a9e37 USB: ohci handles hardware faults during root port resets 
I have found a problem where the root_port_reset() goes into an infinite
loop and stalls the kernel.

This happens when a hardware fault inside the machine occurs during a small
timing window.  In case of USB device connection, if a USB device responds to
hcd_submit_urb(), and later the controller fails before root_port_reset(),
root_port_reset() will loop infinitely because ohci_readl() will always
return "-1".  Such a failure can include ejecting a CardBus OHCI controller.

The probability of this problem is low, but it will increase if PnP type
usage is frequent.  The attached patch can solve this problem and I believe
that it is better to fix this problem.

Signed-off-by: Takamasa Ohtake <ohtake-txa@necst.nec.co.jp>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-20 10:14:27 -08:00
..
acorn [PATCH] getting rid of all casts of k[cmz]alloc() calls 2006-12-13 09:05:58 -08:00
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] pata_via: Cable detect error 2006-12-16 10:46:21 -05:00
atm [PATCH] getting rid of all casts of k[cmz]alloc() calls 2006-12-13 09:05:58 -08:00
base Driver core: Make platform_device_add_data accept a const pointer 2006-12-13 15:38:46 -08:00
block Merge branch 'for-linus' of git://brick.kernel.dk/data/git/linux-2.6-block 2006-12-13 09:15:34 -08:00
bluetooth [PATCH] lockdep: annotate bcsp driver 2006-12-07 08:39:34 -08:00
cdrom [PATCH] getting rid of all casts of k[cmz]alloc() calls 2006-12-13 09:05:58 -08:00
char [PATCH] getting rid of all casts of k[cmz]alloc() calls 2006-12-13 09:05:58 -08:00
clocksource [PATCH] clocksource: small cleanup 2006-12-10 09:57:22 -08:00
connector [CONNECTOR]: Replace delayed work with usual work queue. 2006-12-18 01:53:58 -08:00
cpufreq [CPUFREQ] fixes typo in cpufreq.c 2006-12-13 10:11:25 -05:00
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
fc4 [PATCH] getting rid of all casts of k[cmz]alloc() calls 2006-12-13 09:05:58 -08:00
firmware [PATCH] dell_rbu: fix error check 2006-11-16 11:43:38 -08:00
hid input/hid: Supporting more keys from the HUT Consumer Page 2006-12-14 13:37:24 +01:00
hwmon hwmon: New AMS hardware monitoring driver 2006-12-12 18:18:30 +01:00
i2c Merge branch 'hwmon-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6 2006-12-13 09:13:19 -08:00
ide [PATCH] getting rid of all casts of k[cmz]alloc() calls 2006-12-13 09:05:58 -08:00
ieee1394 i2c: Discard the i2c algo del_bus wrappers 2006-12-10 21:21:33 +01:00
infiniband IB/mthca: Use DEFINE_MUTEX() instead of mutex_init() 2006-12-15 20:55:28 -08:00
input [SUNKBD]: Fix sunkbd_enable(sunkbd, 0); obvious. 2006-12-17 14:06:58 -08:00
isdn [PATCH] getting rid of all casts of k[cmz]alloc() calls 2006-12-13 09:05:58 -08:00
kvm [PATCH] KVM: Fix vmx hardware_enable() on macbooks 2006-12-13 09:05:48 -08:00
leds kconfig: Standardize "depends" -> "depends on" in Kconfig files 2006-12-12 20:04:19 +01:00
macintosh [PATCH] getting rid of all casts of k[cmz]alloc() calls 2006-12-13 09:05:58 -08:00
mca
md [PATCH] md: Don't assume that READ==0 and WRITE==1 - use the names explicitly 2006-12-13 09:05:48 -08:00
media [PATCH] getting rid of all casts of k[cmz]alloc() calls 2006-12-13 09:05:58 -08:00
message [PATCH] getting rid of all casts of k[cmz]alloc() calls 2006-12-13 09:05:58 -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] getting rid of all casts of k[cmz]alloc() calls 2006-12-13 09:05:58 -08:00
net [TG3]: Update version and reldate. 2006-12-17 21:59:23 -08:00
nubus
oprofile [PATCH] struct path: convert oprofile 2006-12-08 08:28:48 -08:00
parisc [PATCH] getting rid of all casts of k[cmz]alloc() calls 2006-12-13 09:05:58 -08:00
parport [PATCH] Kconfig refactoring for better menu nesting 2006-12-10 09:55:39 -08:00
pci [PATCH] getting rid of all casts of k[cmz]alloc() calls 2006-12-13 09:05:58 -08:00
pcmcia [PATCH] Fix numerous kcalloc() calls, convert to kzalloc() 2006-12-13 09:05:52 -08:00
pnp [PATCH] getting rid of all casts of k[cmz]alloc() calls 2006-12-13 09:05:58 -08:00
ps3 [POWERPC] ps3: Add vuart support 2006-12-11 13:49:53 +11:00
rapidio
rtc [PATCH] rtc framewok: rtc_wkalrm.enabled reporting updates 2006-12-13 09:05:52 -08:00
s390 [S390] cio: css_register_subchannel race. 2006-12-15 17:18:30 +01:00
sbus [PATCH] getting rid of all casts of k[cmz]alloc() calls 2006-12-13 09:05:58 -08:00
scsi [PATCH] m68k trivial build fixes 2006-12-17 10:21:53 -08:00
serial [PATCH] Add support for Korenix 16C950-based PCI cards 2006-12-13 09:18:11 -08:00
sh
sn
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 USB: ohci handles hardware faults during root port resets 2006-12-20 10:14:27 -08:00
video [PATCH] getting rid of all casts of k[cmz]alloc() calls 2006-12-13 09:05:58 -08:00
w1 [PATCH] w1: Fix for kconfig entry typo 2006-12-13 09:05:48 -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