This patch makes usbcore behave better with system sleep states, fixing
some PM/PCI integration problems as well as some PM/USB ones.

 - PCI HCDs should behave better, even if they don't support PCI PM;
   tested with both ACPI and APM suspend cycles, and swsusp.

 - Systems that advertise ACPI S1 support don't necessarily support the
   PCI D1 or D2 states for their USB controllers.  (Examples include
   Centrino laptops.)  This patch makes them suspend into D3hot, which
   always works (and won't take much longer to resume, either).

 - Handle the "go into deeper suspend" transition the way PCI drivers
   are supposed to.

 - Understand that USB only has one suspend state:  if the device is
   suspended, it can't do any better.

 - Export some symbols to HCDs, so they can reuse more of the existing
   usbcore framework.

Plus minor related cleanups.

The PCI D1/D2 state issue is a variant of an earlier problem, with the
same root cause:  the PM core thinking there's a one-to-one mapping
between system states (roughly:  ACPI S0/S1/S3/S4) and PCI states that
a given device can support (only D0 is required, D3hot is common).
That same issue comes up again with USB.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

Hi,

Patch below removes somem dead, never used code from the usbvideo driver,
including a function that uses interruptible_sleep_on_timeout() oddly.
Signed-off-by: Arjan van de Ven <arjan@fenrus.demon.nl>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

This patch adds a workaround for host controllers that don't properly
support remote wakeup.  That includes Intel controllers (on certain badly
designed motherboards) and a recent Genesys Logic controller.  Although
the UHCI driver avoids suspending the Intel-based controllers, this
workaround will handle things about as well.

In the not-too-distant future I will have to revamp most of the root-hub
suspend/resume code in the UHCI driver.  For now, please apply the patch.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

This patch adds the Delorme Earthmate usb gps and the Cypress hid->com
rs232 adapter to hid-core's device blacklist.
Signed-off-by: Lonnie Mendez <lmendez19@austin.rr.com>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

Description: Use msleep() instead of schedule_timeout() to guarantee the
task delays as expected.
Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

 - fix broken IBM cyclone time interpolator support
 - add support for cyclic timers through an addition of a mask
   in the timer interpolator structure
 - Allow time_interpolator_update() and time_interpolator_get_offset()
   to be invoked without an active time interpolator
   (necessary since the cyclone clock is initialized late in ACPI
   processing)
 - remove obsolete function time_interpolator_resolution()
 - add a mask to all struct time_interpolator setups in the
   kernel
 - Make time interpolators work on 32bit platforms
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Move hotplug_path[] out of kmod.[ch] to kobject_uevent.[ch] where
it belongs now. At some time in the future we should fix the remaining bad
hotplug calls (no SEQNUM, no netlink uevent):

  ./drivers/input/input.c (no DEVPATH on some hotplug events!)
  ./drivers/pnp/pnpbios/core.c
  ./drivers/s390/crypto/z90main.c
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

Driver core: when binding device to a driver create "driver"
             symlink in device's directory. Rename serio's
             "driver" attribute to "drvctl" (write-only)
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

On Sat, Oct 30, 2004 at 04:54:29AM +0200, Kay Sievers wrote:
> On Sat, Oct 30, 2004 at 02:25:23AM +0200, Kay Sievers wrote:
> > On Sat, Oct 30, 2004 at 02:00:45AM +0200, Kay Sievers wrote:
> > > On Fri, Oct 29, 2004 at 06:13:19PM -0500, Greg KH wrote:
> > > > On Fri, Oct 29, 2004 at 11:28:56PM +0200, Kay Sievers wrote:
> > > > > > But there might still be a problem.  With this change, the sequence
> > > > > > number is not sent out the kevent message.  Kay, do you think this is an
> > > > > > issue?  I don't think we can get netlink messages out of order, right?
> > > > >
> > > > > Right, especially not the events with the same DEVPATH, like "remove"
> > > > > beating an "add". But I'm not sure if the number isn't useful. Whatever
> > > > > we may do with the hotplug over netlink in the future, we will only have
> > > > > /sbin/hotplug for the early boot and it may be nice to know, what events
> > > > > we have already handled...
> > > > >
> > > > > > I'll hold off on applying this patch until we figure this out...
> > > > >
> > > > > How about just reserving 20 bytes for the number (u64 will never be
> > > > > more than that), save the pointer to that field, and fill the number in
> > > > > later?
> > > >
> > > > Ah, something like this instead?  I like it, it's even smaller than the
> > > > previous patch.  Compile tested only...
> > >
> > > I like that. How about the following. It will keep the buffer clean from
> > > random chars, cause the kevent does not have the vector and relies on
> > > the '\0' to separate the strings from each other.
> > > I've tested it. The netlink-hotplug message looks like this:
> > >
> > > recv(3, "remove@/class/input/mouse2\0ACTION=remove\0DEVPATH=/class/input/mouse2\0SUBSYSTEM=input\0SEQNUM=961                 \0", 1024, 0) = 113
> >
> > Hmm, these trailing spaces are just bad, sorry. I'll better pass the
> > envp array over to send_uevent() and clean up the keys while copying
> > the env values into the skb buffer. This will make the event payload
> > more safe too. So your first version looks better.
>
> How about this? We copy over key by key into the skb buffer and the
> netlink message can get the envp array without depending on a single
> continuous buffer.
>
> The netlink message looks nice like this now:
>
> recv(3, "
>   add@/devices/pci0000:00/0000:00:1d.1/usb3/3-2/3-2:1.0\0
>   HOME=/\0
>   PATH=/sbin:/bin:/usr/sbin:/usr/bin\0
>   ACTION=add\0
>   DEVPATH=/devices/pci0000:00/0000:00:1d.1/usb3/3-2/3-2:1.0\0
>   SUBSYSTEM=usb\0
>   SEQNUM=991\0
>   DEVICE=/proc/bus/usb/003/008\0
>   PRODUCT=46d/c03e/2000\0
>   TYPE=0/0/0\0
>   INTERFACE=3/1/2\0
> ", 1024, 0) = 268

Here is an improved version that uses skb_put() to fill the skb buffer,
instead of trimming the buffer to the final size after we've copied over
all keys.
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

Driver core: rename bus_match into driver_probe_device and export
             it so subsystems can bind an individual device to a
             specific driver without getting involved with driver
             core internals.
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

Driver core: make device_attach() global and export it and
             driver_attach() so subsystems can have finer
             control over binding process.
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

From: Paul Mackerras <paulus@samba.org>

Currently the device_pm_foo() functions are rather prone to deadlocks
during suspend/resume.  This is because the dpm_sem is held for the
duration of device_suspend() and device_resume() as well as device_pm_add()
and device_pm_remove().  If for any reason you get a device addition or
removal triggered by a device's suspend or resume code, you get a deadlock.
 (The classic example is a USB host adaptor resuming and discovering that
the mouse you used to have plugged in has gone away.)

This patch fixes the problem by using a separate semaphore, called
dpm_list_sem, to cover the places where we need the device pm lists to be
stable, and by being careful about how we traverse the lists on suspend and
resume.  I have analysed the various cases that can occur and I am
confident that I have handled them all correctly.  I posted this patch
together with a detailed analysis 10 days ago.

Signed-off-by Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

From: Simon Derr <Simon.Derr@bull.net>

Add a `needs_read_fill' field in sysfs_buffer so that reading after a write in
a sysfs file returns valid data.

(instead of the data that have been written, that may be invalid or at the
wrong offset)
Signed-off-by: Simon Derr <simon.derr@bull.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

From: Simon Derr <Simon.Derr@bull.net>

- fixes the race between threads by adding a semaphore in sysfs_buffer

- allocates the buffer upon call to pread().  We still call again
  fill_read_buffer() if the file is "rewinded" to offset zero.

- fixes the comparison in flush_read_buffer().
Signed-off-by: Simon Derr <simon.derr@bull.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

From: Maneesh Soni <maneesh@in.ibm.com>

o This patch stops the pinning of non-directory or leaf dentries and inodes.
  The leaf dentries and inodes are created during lookup based on the
  entries on sysfs_dirent tree. These leaves are removed from the dcache
  through the VFS dentry ageing process during shrink dcache operations. Thus
  reducing about 80% of sysfs lowmem needs.

o This implments the ->lookup() for sysfs directory inodes and allocates
  dentry and inode if the lookup is successful and avoids the need of
  allocating and pinning of dentry and inodes during the creation of
  corresponding sysfs leaf entry. As of now the implementation has not
  required negative dentry creation on failed lookup. As sysfs is still a
  RAM based filesystem, negative dentries are not of any use IMO.

o The leaf dentry allocated after successful lookup is connected to the
  existing corresponding sysfs_dirent through the d_fsdata field.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

From: Maneesh Soni <maneesh@in.ibm.com>

o This patch implements the sysfs_dir_operations file_operations strucutre for
  sysfs directories. It uses the sysfs_dirent based tree for ->readdir() and
  ->lseek() methods instead of simple_dir_operations which use dentry based
  tree.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

From: Maneesh Soni <maneesh@in.ibm.com>

o This patch uses the sysfs_dirent based tree while removing sysfs files
  and directories. This avoids holding dcache_lock by not using dentry
  based vfs tree. Thus simplyfying the removal logic in sysfs.

o It uses two helper routines sysfs_get_name(), to get the name for
  sysfs element and sysfs_drop_dentry() to delete the dentry given a
  sysfs_dirent.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

From: Maneesh Soni <maneesh@in.ibm.com>

o This patch introduces the new sysfs_dirent data structure. The sysfs_dirent
  is added to the dentry corresponding to each of the element which can be
  represented in sysfs like, kobject (directory), text or binary attributes
  (files), attribute groups (directory) and symlinks.

o It uses dentry's d_fsdata field to attach the corresponding sysfs_dirent.

o The sysfs_dirents are maintained in a tree of all the sysfs entries using the
  s_children and s_sibling list pointers.

o This patch also changes how we access attributes and kobjects in
  file_operations from a given dentry, basically introducing one more level of
  indirection.

o The sysfs_dirents are freed and the sysfs_dirent tree is updated accordingly
  upon the deletion of corresponding dentry. The sysfs dirents are kept alive
  as long as there is corresponding dentry around. The are freed when the
  dentry is finally out of dcache using the ->d_iput() method.

o This also fixes the dentry leaks in case of error paths after sysfs has
  got a newly alocated (and hashed) dentry from sysfs_get_dentry() by
  d_drop()'ing the dentry.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

From: Maneesh Soni <maneesh@in.ibm.com>

My fault, a bad typo in fs/sysfs/bin.c.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

From: Maneesh Soni <maneesh@in.ibm.com>

o The following patch provides dumb helpers to access the corresponding
  kobject, attribute or binary attribute given a dentry and prepare the
  sysfs_file_operation methods for using sysfs_dirents.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

Add light-weight-syscall support to parisc. The first LWS is atomic CAS.
Committed-by: Carlos O'Donell <carlos@parisc-linux.org>

Add user_space macro, to determine if we are in a user
versus kernel space.
Committed-by: Carlos O'Donell <carlos@parisc-linux.org>

Calling sys_restart_syscall without having taking a signal
across a syscall leaves the restart_block uninitialized,
allowing malicious user code to crash the kernel.

FIX:

Define INIT_THREAD_INFO such that restart_block.fn is set to
the default do_not_restart_syscall.
Committed-by: Carlos O'Donell <carlos@parisc-linux.org>

Enable SMP on A500 by default
Committed-by: Paul Bame <bame@parisc-linux.org>

Fix N class SMP

The main fixes are:

 - memory barriers to our space and control register moves
 - fix for the N class merced bus problem which can't have more than
   one PxTLB broadcast outstanding at once
 - make smp_call_function() wait until the function completes

This now boots and runs on a 32MB N4000 in Fort Collins with 2 cpus
and discontig mem support.
Committed-by: James Bottomley <jejb@parisc-linux.org>
Committed-by: Randolph Chung <tausq@parisc-linux.org>

Add a make install target
Committed-by: Matthew Wilcox <willy@parisc-linux.org>

PA-RISC does have spinlock debugging and doesn't have the frame pointer
option.  USERMODE had been added twice to spinlock debugging, so remove that.
Committed-by: Randolph Chung <tausq@parisc-linux.org>
Committed-by: Matthew Wilcox <willy@parisc-linux.org>

add some more BL macros and b,l in appropriate places in entry.S to
expand the range of our jumps and work around the 64 bit binutils problem
where it will allow the jump ranges to go beyond their permitted limits
without complaining.
Committed-by: James Bottomley <jejb@parisc-linux.org>

add HP copyright
Committed-by: Grant Grundler <grundler@parisc-linux.org>

small debug cleanup
Committed-by: Randolph Chung <tausq@parisc-linux.org>

Merge head64.S and head.S
Cleanup 64-bit sp manipulations
Committed-by: Kyle McMartin <kyle@parisc-linux.org>
Committed-by: Randolph Chung <tausq@parisc-linux.org>

into ppc970.osdl.org:/home/torvalds/v2.6/linux

CONFIG_IDEDMA_PCI_AUTO and CONFIG_IDEDMA_ICS_AUTO

Host drivers should deal with broken hardware themselves.
Warn if DMA support is enabled but "enable DMA by default" is not.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

"hdx=autotune", "hdx=noautotune":
* should be handled by host drivers needing them

"idex=autotune", "idex=noautotune":
* should die

"idex=ata66":
* should be handled by host drivers needing it

"idex=dma":
* works only for: cs5220.c, generic.c, hpt366.c, triflex.c
* DMA should be used by default

"idex=reset", "idex=serialize":
* host drivers should set these settings when needed

"idex=base[,ctl[,irq]]":
* host drivers should auto-detect correct settings
* ordering should be controlled by user-space

"ide0=four":
* should be handled by ide-generic driver
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Majority of these settings is also available through ioctls.
We will deal with the rest during deprecation period.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

From: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Without this patch my HP CD-Writer doesn't work.
With this applied everything is fine.
Signed-off-by: Tero Roponen <teanropo@cc.jyu.fi>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

into ppc970.osdl.org:/home/torvalds/v2.6/linux

Need to include linux/in6.h in m68knommu checksum.h to get
a clean compile. All other architectures to this too.
Signed-off-by: Greg Ungerer <gerg@snapgear.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Add build support for new CPU families and boards. Specifically for
the 527x ColdFire family, and the generic 528x CPU family.
Also made the switch to -O1, gives smaller code on m68k and ColdFire
platforms.
Signed-off-by: Greg Ungerer <gerg@snapgear.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>