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This patch puts all SBUS/UPA selection under one option "SBUS/UPA
framebuffers" and moves all sparc specific drivers next to them in one group.
Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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'ioc' should be deallocated if __copy_from_user fails (found by Coverity
- CID 1644).
Signed-off-by: Florin Malita <fmalita@gmail.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Optimize select by a using stack space for small fd sets.
core_sys_select() already has this optimization. This is for compat
version.
Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Steve Hawkes discovered a problem where recalc_sigpending_tsk was called in
do_sigaction but no signal_wake_up call was made, preventing later signals
from waking up blocked threads with TIF_SIGPENDING already set.
In fact, the few other calls to recalc_sigpending_tsk outside the signals
code are also subject to this problem in other race conditions.
This change makes recalc_sigpending_tsk private to the signals code. It
changes the outside calls, as well as do_sigaction, to use the new
recalc_sigpending_and_wake instead.
Signed-off-by: Roland McGrath <roland@redhat.com>
Cc: <Steve.Hawkes@motorola.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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kmalloc for flush_words resulted in zero size allocation when no
k8_northbridges existed. Short circuit the code path for this case.
Also remove uneeded zeroing of num_k8_northbridges just after checking if
it is zero.
Signed-off-by: Ben Collins <bcollins@ubuntu.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Fix the obvious errors in the explanation of Kconfig files.
Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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There have been a number of instances where people have accidentally compiled
rcutorture into the kernel (CONFIG_RCU_TORTURE_TEST=y), which has never been
useful, and has often resulted in great frustration.
The attached patch prohibits rcutorture from being compiled into the
kernel. It may be excluded altogether or compiled as a module. People
wishing to have rcutorture hammer their machine immediately upon boot
are free to hand-edit lib/Kconfig.debug to remove the "depends on m"
line.
Thanks to Randy Dunlap for the trick that makes this work.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Josh Triplett <josh@kernel.org>
Cc: "Randy.Dunlap" <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Make the PTRACE_SYSEMU checking more robust. It will make sure that system
call numbers are reported correctly. If there is a problem, it will disable
PTRACE_SYSEMU use and use PTRACE_SYSCALL instead.
Thanks to Balaji G for helping reproduce this problem.
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Message size needs to be checked before copying, or bad things could
happen.
Signed-off-by: Domen Puncer <domen.puncer@telargo.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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include/linux/capability.h:397: warning: "struct task_struct" declared inside parameter list
include/linux/capability.h:397: warning: its scope is only this definition or declaration, which is probably not what you want
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Send an uevent to user space to indicate that a media change event has
occurred.
Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Allow user space to determine if a disk supports Asynchronous Notification of
media changes. This is done by adding a new sysfs file "capability_flags",
which is documented in (insert file name). This sysfs file will export all
disk capabilities flags to user space. We also define a new flag to define
the media change notification capability.
Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The warning in the NOHZ code, which triggers when a CPU goes idle with
softirqs pending can fill up the logs quite quickly. Rate limit the output
until we found the root cause of that problem.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Update the SPI documentation to cover a few points that have proven to be
confusing or unclear; most notably the two clock mode bits.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Fix mpc5200 PSC SPI driver to actually work for CONFIG_PPC_MERGE
- s/mpc52xx/mpc5200/, as this was changed in device tree some time ago
- fix spi id detection
The move from 'ppc' to 'powerpc' didn't quite match the latest
kernel.org code.
Signed-off-by: Domen Puncer <domen.puncer@telargo.com>
Acked-by: Dragos Carp <dragos.carp@toptica.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The wrong lookup flag was tested in ->create() causing havoc (error or
Oops) when a regular file was created with mknod() in a fuse filesystem.
Thanks to J. Cameijo Cerdeira for the report.
Kernels 2.6.18 onward are affected. Please apply to -stable as well.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The object size calculation is wrong if !CONFIG_SLUB_DEBUG because the
#ifdef CONFIG_SLUB_DEBUG is now switching off the size adjustments for
DESTROY_BY_RCU and ctor.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Acked-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Booting a SMP kernel with maxcpus=1 on a SMP system leads to a hard hang,
because ACPI ignores the maxcpus setting and sends timer broadcast info for
the offline CPUs. This results in a stuck for ever call to
smp_call_function_single() on an offline CPU.
Ignore the bogus information and print a kernel error to remind ACPI
folks to fix it.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Other than refrigerator, no one else calls frozen_process(). So move it from
include/linux/freezer.h to kernel/power/process.c.
Also, since a task can be marked as frozen by itself, we don't need to pass
the (struct task_struct *p) parameter to frozen_process().
Signed-off-by: Gautham R Shenoy <ego@in.ibm.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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This patch fixes the race pointed out by Oleg Nesterov.
* Freezer marks a thread as freezeable.
* The thread now marks itself PF_NOFREEZE, but it will be frozen on
on calling try_to_freeze(). Thus the task is frozen, even though it doesn't
want to.
* Subsequent thaw_processes() will also fail to thaw the task since it is
marked PF_NOFREEZE.
Avoid this problem by checking the task's PF_NOFREEZE status in
frozen_processes() before marking the task as frozen.
Signed-off-by: Gautham R Shenoy <ego@in.ibm.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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kthread() sleeps in TASK_INTERRUPTIBLE state waiting for the first wakeup. In
theory, this wakeup may come from freeze_process()->signal_wake_up(), so the
task can disappear even before kthread_create() sets its ->comm.
Change kthread() to use TASK_UNINTERRUPTIBLE.
[akpm@linux-foundation.org: s/BUG_ON/WARN_ON+recover]
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Kernel threads can become userland processes by calling kernel_execve().
In particular, this may happen right after the try_to_freeze_tasks()
called with FREEZER_USER_SPACE has returned, so try_to_freeze_tasks()
needs to take userspace processes into consideration even if it is
called with FREEZER_KERNEL_THREADS.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Currently try_to_freeze_tasks() has to wait until all of the vforked processes
exit and for this reason every user can make it fail. To fix this problem we
can introduce the additional process flag PF_FREEZER_SKIP to be used by tasks
that do not want to be counted as freezable by the freezer and want to have
TIF_FREEZE set nevertheless. Then, this flag can be set by tasks using
sys_vfork() before they call wait_for_completion(&vfork) and cleared after
they have woken up. After clearing it, the tasks should call try_to_freeze()
as soon as possible.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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If the freezing of tasks fails and a task is preempted in refrigerator()
before calling frozen_process(), then thaw_tasks() may run before this task is
frozen. In that case the task will freeze and no one will thaw it.
To fix this race we can call freezing(current) in refrigerator() along with
frozen_process(current) under the task_lock() which also should be taken in
the error path of try_to_freeze_tasks() as well as in thaw_process().
Moreover, if thaw_process() additionally clears TIF_FREEZE for tasks that are
not frozen, we can be sure that all tasks are thawed and there are no pending
"freeze" requests after thaw_tasks() has run.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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gcc-4.3:
drivers/ide/pci/serverworks.c: In function 'svwks_tune_chipset':
drivers/ide/pci/serverworks.c:176: warning: overflow in implicit constant conversion
drivers/ide/pci/serverworks.c:190: warning: overflow in implicit constant conversion
drivers/ide/pci/serverworks.c:211: warning: overflow in implicit constant conversion
drivers/ide/pci/serverworks.c:212: warning: overflow in implicit constant conversion
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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There are a few entries in ata_device_blacklist[] in libata-core.c
marked with HORKAGE_NODMA but are missing from drive_blacklist[]
in ide-dma.c. This patch makes the lists in sync.
Also remove a duplicated entry for "SanDisk SDP3B-64".
Signed-off-by: Junio C Hamano <junkio@cox.net>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Dave Jones <davej@redhat.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Compiling with '-Wswitch-enum' I noticed following:
CC drivers/ide/ide-proc.o
drivers/ide/ide-proc.c: In function âproc_ide_read_imodelâ:
drivers/ide/ide-proc.c:54: warning: enumeration value âide_etrax100â not handled in switch
drivers/ide/ide-proc.c:54: warning: enumeration value âide_acornâ not handled in switch
How about the following patch?
Signed-off-by: Mika Kukkonen <mikukkon@iki.fi>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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It turns out from customer reports to Red Hat and some PCI dumps that the
MegaIDE in RAID mode doesn't provide the drive tuning data that the
serverworks driver expects but sometimes does provide something that
fools the code.
For the RAID class case skip the oem setup and don't trust the BIOS data.
We then tune from scratch and this sorts it out. (This has been confirmed
on an afflicted IBM blade)
[libata serverworks.c never trusts the BIOS in the first place so is
accidentally immune]
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Add the IDE device ID to atiixp_pci_tbl struct in atiixp.c for ATI SB700.
From: Henry Su <henry.su@amd.com>
Signed-off-by: Luugi Marsan <luugi.marsan@amd.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
* 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6:
[RTNETLINK]: Remove remains of wireless extensions over rtnetlink
[RTNETLINK]: Allow changing of subsets of netdevice flags in rtnl_setlink
[AF_RXRPC]: Make call state names available if CONFIG_PROC_FS=n
[AF_RXRPC]: AF_RXRPC depends on IPv4
[IPSEC]: Fix warnings with casting int to pointer
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* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/usb-2.6: (29 commits)
USB: Add support for Olimex arm-usb-ocd JTAG interface serial port
USB: Add support for Sierra Wireless Aircard 595U
USB: ldusb bugfix
USB: ftdi_sio: Add USB Product Id for OpenDCC
USB: fix ratelimit call semantics
USB: handle errors in power/level attribute
USB: make the autosuspend workqueue thread freezable
USB: Fix USB OHCI Subvendor for Toshiba Portege 4000
USB: usblp: Use correct DMA address in case of probe error
USB: Fix debug output of ark3116
USB: Onetouch - switch to using input_dev->dev.parent
USB: don't try to kzalloc 0 bytes
USB: remove short initial timeout for device descriptor fetch
USB: Deref URB after usbmon is done with it
USB: Remove duplicate IDs from option card driver
USB: auerswald: fix file release handler
USB: fsl_usb2_udc: Fix UMTI_WIDE support and a compile warning
USB: set the correct Interrupt interval in usb_bulk_msg
USB: New device PID for ftdi_sio driver
USB: remove unneeded WARN_ON
...
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git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: ads7846 - SPI_CPHA mode bugfix
Input: ads7846 - document that it handles tsc2046 too
Input: input-polldev - add module info
Input: ucb1x00-ts - remove commented out code
Input: ucb1400_ts - use sched_setscheduler()
Input: ALPS - force stream mode
Input: iforce - minor clean-ups
Input: iforce - fix force feedback not working
Input: adbhid - do not access input_dev->private directly
Input: logips2pp - add type 72 (PS/2 TrackMan Marble)
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This patch adds support for the serial port on Olimex arm-usb-ocd
JTAG interface.
The device appears as two serial ports, but the first one is reserved
for the JTAG interface. The JTAG interface can be used with OpenOCD
from userspace. For more information, please see:
http://openocd.berlios.de/web/
http://www.olimex.com/dev/arm-usb-ocd.html
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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This patch adds support for the newly released Aircard 595U EVDO
modem to the Sierra Wireless driver (sierra.c) in kernel 2.6.21.
I suspect that my mailer may be mangling patches so let me know and
I'll try to resend it.
From: Danny Budik <dbudik@ist-traffic.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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This patch fixes a problem reported with consecutive reads in the ldusb
driver.
Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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USB product id registration for the OpenDCC (www.opendcc.de)
model railway central unit. Applies to 2.6.21.1.
Signed-off-by: Guido Scholz <guido.scholz@bayernline.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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This patch (as910) fixes a ratelimit modification so that the
original error-handling path will be followed even when the log-rate
limitation kicks in.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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This patch (as906) improves the error handling for the USB power/level
attribute file. If an error occurs, the original power-level settings
will be restored.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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This patch (as881b) makes the ksuspend_usb_wq workqueue freezable. We
don't want a rogue workqueue thread running around, unexpectedly
suspending or resuming USB devices in the middle of a system sleep
transition.
This fixes Bugzilla #8498.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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This fixes a bug in an OHCI quirk handler for Portege 4000; the
Subvendor is 0x1179 (PCI_VENDOR_ID_TOSHIBA)
not 0x102f (PCI_VENDOR_ID_TOSHIBA_2)
bugid 8510
00:02.0 USB Controller [0c03]: ALi Corporation USB 1.1 Controller
[10b9:5237] (rev 03) (prog-if 10 [OHCI])
Subsystem: Toshiba America Info Systems Unknown device [1179:0004]
Flags: bus master, medium devsel, latency 64, IRQ 11
Memory at f7eff000 (32-bit, non-prefetchable) [size=4K]
Capabilities: <access denied>
Signed-off-by: Andrey Borzenkov <arvidjaar@mail.ru>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Looks like the error path had a copy-paste error. The normal exit path
uses correct URB already.
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Fix debug output. Previously, it would output "0xFFFFFFB0" on 32-bit
archs (and probably "0xFFFFFFFFFFFFFFB0" on 64-bits), because buf is
taken as signed char, which is promoted to signed int, while %x always
expects an unsigned int.
Signed-off-by: Jan Engelhardt <jengelh@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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In preparation for struct class_device -> struct device input
core conversion, switch to using input_dev->dev.parent when
specifying device position in sysfs tree.
Also, do not access input_dev->private directly, use helpers.
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Matthew Dharm <mdharm-usb@one-eyed-alien.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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This patch (as907) prevents us from trying to allocate 0 bytes
when an interface has no endpoint descriptors.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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This patch (as905) removes a micro-optimization from the hub port
initialization code. Previously we had been using a short timeout on
the first attempt the read the device descriptor; now we will use the
standard timeout length.
It's not clear that the short timeout ever provided any benefit. And
now we know of one case where it actually hurts: The device can't meet
the short timeout and then it gets terminally confused.
This fixes Bugzilla #8444.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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I haven't personally run across an oops because of this, but I feel safer
with this fix in place.
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Cc: Matthias Urlichs <smurf@smurf.noris.de>
Signed-off-by: Ben Collins <bcollins@ubuntu.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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If this down_interruptible() does fail due to signal_pending() then the state
of the driver will get trashed in interesting ways, because userspace cannot
and will not retry the close().
Cc: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Change PORT_WIDTH bit for UMTI_WIDE mode and fix a compile warning
introduced in last revision.
Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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This patch (as902) fixes a mistake I introduced into usb_bulk_msg().
usb_fill_int_urb() already does the bit-shifting calculation for
high-speed Interrupt intervals; it shouldn't be done twice.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
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