linux-toradex.git/include, branch v2.6.29-rc6

PM: Split up sysdev_[suspend|resume] from device_power_[down|up]

2009-02-22T18:33:44+00:00

Move the sysdev_suspend/resume from the callee to the callers, with
no real change in semantics, so that we can rework the disabling of
interrupts during suspend/hibernation.

This is based on an earlier patch from Linus.

Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Linus Torvalds

Merge branch 'hibernate'

2009-02-21T22:17:26+00:00

* hibernate:
  PM: Fix suspend_console and resume_console to use only one semaphore
  PM: Wait for console in resume
  PM: Fix pm_notifiers during user mode hibernation
  swsusp: clean up shrink_all_zones()
  swsusp: dont fiddle with swappiness
  PM: fix build for CONFIG_PM unset
  PM/hibernate: fix "swap breaks after hibernation failures"
  PM/resume: wait for device probing to finish
  Consolidate driver_probe_done() loops into one place

Consolidate driver_probe_done() loops into one place

2009-02-21T22:17:17+00:00

there's a few places that currently loop over driver_probe_done(), and
I'm about to add another one. This patch abstracts it into a helper
to reduce duplication.

Signed-off-by: Arjan van de Ven 
Signed-off-by: Rafael J. Wysocki 
Cc: Len Brown 
Acked-by: Greg KH 
Signed-off-by: Linus Torvalds

Merge branch 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6

2009-02-21T02:04:53+00:00

* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: (26 commits)
  drm/radeon: update sarea copies of last_ variables on resume.
  drm/i915: Keep refs on the object over the lifetime of vmas for GTT mmap.
  drm/i915: take struct mutex around fb unref
  drm: Use spread spectrum when the bios tells us it's ok.
  drm: Collapse identical i8xx_clock() and i9xx_clock().
  drm: Bring PLL limits in sync with DDX values.
  drm: Add locking around cursor gem operations.
  drm: Propagate failure from setting crtc base.
  drm: Check for a NULL encoder when reverting on error path
  drm/i915: Cleanup the hws on ringbuffer constrution failure.
  drm/i915: Don't add panel_fixed_mode to the probed modes list at LVDS init.
  drm: Release user fbs in drm_release
  drm/i915: Unpin the fb on error during construction.
  drm/i915: Unpin the hws if we fail to kmap.
  drm/i915: Unpin the ringbuffer if we fail to ioremap it.
  drm/i915: unpin for an invalid memory domain.
  drm/i915: Release and unlock on mmap_gtt error path.
  drm/i915: Set framebuffer alignment based upon the fence constraints.
  drm: Do not leak a new reference for flink() on an existing name
  drm/i915: Fix potential AB-BA deadlock in i915_gem_execbuffer()
  ...

8250: fix boot hang with serial console when using with Serial Over Lan port

2009-02-21T01:57:50+00:00

Intel 8257x Ethernet boards have a feature called Serial Over Lan.

This feature works by emulating a serial port, and it is detected by
kernel as a normal 8250 port.  However, this emulation is not perfect, as
also noticed on changeset 7500b1f602aad75901774a67a687ee985d85893f.

Before this patch, the kernel were trying to check if the serial TX is
capable of work using IRQ's.

This were done with a code similar this:

        serial_outp(up, UART_IER, UART_IER_THRI);
        lsr = serial_in(up, UART_LSR);
        iir = serial_in(up, UART_IIR);
        serial_outp(up, UART_IER, 0);

        if (lsr & UART_LSR_TEMT && iir & UART_IIR_NO_INT)
		up->bugs |= UART_BUG_TXEN;

This works fine for other 8250 ports, but, on 8250-emulated SoL port, the
chip is a little lazy to down UART_IIR_NO_INT at UART_IIR register.

Due to that, UART_BUG_TXEN is sometimes enabled.  However, as TX IRQ keeps
working, and the TX polling is now enabled, the driver miss-interprets the
IRQ received later, hanging up the machine until a key is pressed at the
serial console.

This is the 6 version of this patch.  Previous versions were trying to
introduce a large enough delay between serial_outp and serial_in(up,
UART_IIR), but not taking forever.  However, the needed delay couldn't be
safely determined.

At the experimental tests, a delay of 1us solves most of the cases, but
still hangs sometimes.  Increasing the delay to 5us was better, but still
doesn't solve.  A very high delay of 50 ms seemed to work every time.

However, poking around with delays and pray for it to be enough doesn't
seem to be a good approach, even for a quirk.

So, instead of playing with random large arbitrary delays, let's just
disable UART_BUG_TXEN for all SoL ports.

[akpm@linux-foundation.org: fix warnings]
Signed-off-by: Mauro Carvalho Chehab 
Cc: Alan Cox 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

spi_bitbang: add more lowlevel function documentation

2009-02-21T01:57:49+00:00

This adds more documentation of the lowlevel API to avoid future bugs.

Signed-off-by: Michael Buesch 
Acked-by: David Brownell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

slab: introduce kzfree()

2009-02-21T01:57:48+00:00

kzfree() is a wrapper for kfree() that additionally zeroes the underlying
memory before releasing it to the slab allocator.

Currently there is code which memset()s the memory region of an object
before releasing it back to the slab allocator to make sure
security-sensitive data are really zeroed out after use.

These callsites can then just use kzfree() which saves some code, makes
users greppable and allows for a stupid destructor that isn't necessarily
aware of the actual object size.

Signed-off-by: Johannes Weiner 
Reviewed-by: Pekka Enberg 
Cc: Matt Mackall 
Acked-by: Christoph Lameter 
Cc: Nick Piggin 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

drm/i915: Keep refs on the object over the lifetime of vmas for GTT mmap.

2009-02-20T02:21:13+00:00

This fixes potential fault at fault time if the object was unreferenced
while the mapping still existed.  Now, while the mmap_offset only lives
for the lifetime of the object, the object also stays alive while a vma
exists that needs it.

Signed-off-by: Jesse Barnes 
Signed-off-by: Eric Anholt 
Signed-off-by: Dave Airlie

drm: Propagate failure from setting crtc base.

2009-02-20T02:21:12+00:00

Check the error paths within intel_pipe_set_base() to first cleanup and
then report back the error.

Signed-off-by: Chris Wilson 
Signed-off-by: Eric Anholt 
Signed-off-by: Dave Airlie

drm: Release user fbs in drm_release

2009-02-20T02:21:11+00:00

Avoids leaking fbs and associated buffers on release.

Signed-off-by: Kristian Høgsberg 
Tested-by: Tested-by: Chris Wilson 
Signed-off-by: Eric Anholt 
Signed-off-by: Dave Airlie