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  1. 07 2月, 2014 1 次提交
  3. 06 2月, 2014 3 次提交
    • J
      [media] media: rc: change 32bit NEC scancode format · 18bc1744
      由 James Hogan 提交于 
      Change 32bit NEC scancode format (used by Apple and TiVo remotes) to
encode the data with the correct bit order. Previously the raw bits were
used without being bit reversed, now each 16bit half is bit reversed
compared to before.

So for the raw NEC data:
  (LSB/First) 0xAAaaCCcc (MSB/Last)
(where traditionally AA=address, aa=~address, CC=command, cc=~command)

We now generate the scancodes:
  (MSB) 0x0000AACC (LSB) (normal NEC)
  (MSB) 0x00AAaaCC (LSB) (extended NEC, address check wrong)
  (MSB) 0xaaAAccCC (LSB) (32-bit NEC, command check wrong)

Note that the address byte order in 32-bit NEC scancodes is different to
that of the extended NEC scancodes. I chose this way as it maintains the
order of the bits in the address/command fields, and CC is clearly
intended to be the LSB of the command if the TiVo codes are anything to
go by so it makes sense for AA to also be the LSB.

The TiVo keymap is updated accordingly.
Signed-off-by: NJames Hogan <james.hogan@imgtec.com>
Cc: Mauro Carvalho Chehab <m.chehab@samsung.com>
Cc: Jarod Wilson <jarod@redhat.com>
Cc: linux-media@vger.kernel.org
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>
      18bc1744
    • J
      [media] media: rc: add sysfs scancode filtering interface · 00942d1a
      由 James Hogan 提交于 
      Add and document a generic sysfs based scancode filtering interface for
making use of IR data matching hardware to filter out uninteresting
scancodes. Two filters exist, one for normal operation and one for
filtering scancodes which are permitted to wake the system from suspend.

The following files are added to /sys/class/rc/rc?/:
 - filter: normal scancode filter value
 - filter_mask: normal scancode filter mask
 - wakeup_filter: wakeup scancode filter value
 - wakeup_filter_mask: wakeup scancode filter mask

A new s_filter() driver callback is added which must arrange for the
specified filter to be applied at the right time. Drivers can convert
the scancode filter into a raw IR data filter, which can be applied
immediately or later (for wake up filters).
Signed-off-by: NJames Hogan <james.hogan@imgtec.com>
Cc: Mauro Carvalho Chehab <m.chehab@samsung.com>
Cc: linux-media@vger.kernel.org
Cc: Rob Landley <rob@landley.net>
Cc: linux-doc@vger.kernel.org
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>
      00942d1a
    • J
      [media] rc: ir-raw: Load ir-sharp-decoder module at init · 324a6673
      由 James Hogan 提交于 
      Commit 1d184b0b ([media] media: rc: add raw decoder for Sharp
protocol) added a new raw IR decoder for the sharp protocol, but didn't
add the code to load the module at init as is done for other raw
decoders, so add that code now.
Signed-off-by: NJames Hogan <james.hogan@imgtec.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>
      324a6673
  5. 05 2月, 2014 13 次提交
  7. 04 2月, 2014 15 次提交
  9. 03 2月, 2014 3 次提交
  11. 02 2月, 2014 1 次提交
    • R
      Revert "PCI: Remove from bus_list and release resources in pci_release_dev()" · 04480094
      由 Rafael J. Wysocki 提交于 
      Revert commit ef83b078 "PCI: Remove from bus_list and release
resources in pci_release_dev()" that made some nasty race conditions
become possible.  For example, if a Thunderbolt link is unplugged
and then replugged immediately, the pci_release_dev() resulting from
the hot-remove code path may be racing with the hot-add code path
which after that commit causes various kinds of breakage to happen
(up to and including a hard crash of the whole system).

Moreover, the problem that commit ef83b078 attempted to address
cannot happen any more after commit 8a4c5c32 "PCI: Check parent
kobject in pci_destroy_dev()", because pci_destroy_dev() will now
return immediately if it has already been executed for the given
device.

Note, however, that the invocation of msi_remove_pci_irq_vectors()
removed by commit ef83b078 from pci_free_resources() along with
the other changes made by it is not added back because of subsequent
code changes depending on that modification.

Fixes: ef83b078 (PCI: Remove from bus_list and release resources in pci_release_dev())
Reported-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      04480094
  13. 01 2月, 2014 2 次提交
  15. 31 1月, 2014 2 次提交
    • B
      drivers: xen: deaggressive selfballoon driver · bc1b0df5
      由 Bob Liu 提交于 
      Current xen-selfballoon driver is too aggressive which may cause OOM be
triggered more often. Eg. this bug reported by James:
https://lkml.org/lkml/2013/11/21/158

There are two mainly reasons:
1) The original goal_page didn't consider some pages used by kernel space, like
slab pages and pages used by device drivers.

2) The balloon driver may not give back memory to guest OS fast enough when the
workload suddenly aquries a lot of physical memory.

In both cases, the guest OS will suffer from memory pressure and OOM may
be triggered.

The fix is make xen-selfballoon driver not that aggressive by adding extra 10%
of total ram pages to goal_page.
It's more valuable to keep the guest system reliable and response faster than
balloon out these 10% pages to XEN.
Signed-off-by: NBob Liu <bob.liu@oracle.com>
Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      bc1b0df5
    • Z
      xen/grant-table: Avoid m2p_override during mapping · 08ece5bb
      由 Zoltan Kiss 提交于 
      The grant mapping API does m2p_override unnecessarily: only gntdev needs it,
for blkback and future netback patches it just cause a lock contention, as
those pages never go to userspace. Therefore this series does the following:
- the original functions were renamed to __gnttab_[un]map_refs, with a new
  parameter m2p_override
- based on m2p_override either they follow the original behaviour, or just set
  the private flag and call set_phys_to_machine
- gnttab_[un]map_refs are now a wrapper to call __gnttab_[un]map_refs with
  m2p_override false
- a new function gnttab_[un]map_refs_userspace provides the old behaviour

It also removes a stray space from page.h and change ret to 0 if
XENFEAT_auto_translated_physmap, as that is the only possible return value
there.

v2:
- move the storing of the old mfn in page->index to gnttab_map_refs
- move the function header update to a separate patch

v3:
- a new approach to retain old behaviour where it needed
- squash the patches into one

v4:
- move out the common bits from m2p* functions, and pass pfn/mfn as parameter
- clear page->private before doing anything with the page, so m2p_find_override
  won't race with this

v5:
- change return value handling in __gnttab_[un]map_refs
- remove a stray space in page.h
- add detail why ret = 0 now at some places

v6:
- don't pass pfn to m2p* functions, just get it locally
Signed-off-by: NZoltan Kiss <zoltan.kiss@citrix.com>
Suggested-by: NDavid Vrabel <david.vrabel@citrix.com>
Acked-by: NDavid Vrabel <david.vrabel@citrix.com>
Acked-by: NStefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      08ece5bb