linux-stable.git/drivers/video, branch linux-3.13.y

xen/pvhvm: If xen_platform_pci=0 is set don't blow up (v4).

2014-02-13T21:55:28+00:00

commit 51c71a3bbaca868043cc45b3ad3786dd48a90235 upstream.

The user has the option of disabling the platform driver:
00:02.0 Unassigned class [ff80]: XenSource, Inc. Xen Platform Device (rev 01)

which is used to unplug the emulated drivers (IDE, Realtek 8169, etc)
and allow the PV drivers to take over. If the user wishes
to disable that they can set:

  xen_platform_pci=0
  (in the guest config file)

or
  xen_emul_unplug=never
  (on the Linux command line)

except it does not work properly. The PV drivers still try to
load and since the Xen platform driver is not run - and it
has not initialized the grant tables, most of the PV drivers
stumble upon:

input: Xen Virtual Keyboard as /devices/virtual/input/input5
input: Xen Virtual Pointer as /devices/virtual/input/input6M
------------[ cut here ]------------
kernel BUG at /home/konrad/ssd/konrad/linux/drivers/xen/grant-table.c:1206!
invalid opcode: 0000 [#1] SMP
Modules linked in: xen_kbdfront(+) xenfs xen_privcmd
CPU: 6 PID: 1389 Comm: modprobe Not tainted 3.13.0-rc1upstream-00021-ga6c892b-dirty #1
Hardware name: Xen HVM domU, BIOS 4.4-unstable 11/26/2013
RIP: 0010:[]  [] get_free_entries+0x2e0/0x300
Call Trace:
 [] ? evdev_connect+0x1e3/0x240
 [] gnttab_grant_foreign_access+0x2e/0x70
 [] xenkbd_connect_backend+0x41/0x290 [xen_kbdfront]
 [] xenkbd_probe+0x2f2/0x324 [xen_kbdfront]
 [] xenbus_dev_probe+0x77/0x130
 [] xenbus_frontend_dev_probe+0x47/0x50
 [] driver_probe_device+0x89/0x230
 [] __driver_attach+0x9b/0xa0
 [] ? driver_probe_device+0x230/0x230
 [] ? driver_probe_device+0x230/0x230
 [] bus_for_each_dev+0x8c/0xb0
 [] driver_attach+0x19/0x20
 [] bus_add_driver+0x1a0/0x220
 [] driver_register+0x5f/0xf0
 [] xenbus_register_driver_common+0x15/0x20
 [] xenbus_register_frontend+0x23/0x40
 [] ? 0xffffffffa0014fff
 [] xenkbd_init+0x2b/0x1000 [xen_kbdfront]
 [] do_one_initcall+0x49/0x170

.. snip..

which is hardly nice. This patch fixes this by having each
PV driver check for:
 - if running in PV, then it is fine to execute (as that is their
   native environment).
 - if running in HVM, check if user wanted 'xen_emul_unplug=never',
   in which case bail out and don't load any PV drivers.
 - if running in HVM, and if PCI device 5853:0001 (xen_platform_pci)
   does not exist, then bail out and not load PV drivers.
 - (v2) if running in HVM, and if the user wanted 'xen_emul_unplug=ide-disks',
   then bail out for all PV devices _except_ the block one.
   Ditto for the network one ('nics').
 - (v2) if running in HVM, and if the user wanted 'xen_emul_unplug=unnecessary'
   then load block PV driver, and also setup the legacy IDE paths.
   In (v3) make it actually load PV drivers.

Reported-by: Sander Eikelenboom 
Reported-and-Tested-by: Fabio Fantoni 
Signed-off-by: Konrad Rzeszutek Wilk 
[v2: Add extra logic to handle the myrid ways 'xen_emul_unplug'
can be used per Ian and Stefano suggestion]
[v3: Make the unnecessary case work properly]
[v4: s/disks/ide-disks/ spotted by Fabio]
Reviewed-by: Stefano Stabellini 
Acked-by: Bjorn Helgaas  [for PCI parts]
Signed-off-by: Greg Kroah-Hartman

parisc/sti_console: prefer Linux fonts over built-in ROM fonts

2014-02-06T19:34:09+00:00

commit 8a10bc9d27ceb084b0d8be621a033a475eb9fdfd upstream.

The built-in ROM fonts lack many necessary ASCII characters, which is
why it makes sens to prefer the Linux fonts instead if they are
available.  This makes consoles on STI graphics cards which are not
supported by the stifb driver (e.g. Visualize FXe) looks much nicer.

Signed-off-by: Helge Deller 
Signed-off-by: Greg Kroah-Hartman

Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc

2013-12-10T03:21:39+00:00

Pull powerpc fixes from Ben Herrenschmidt:
 "Here are a handful of powerpc fixes for 3.13.

  The patches are reasonably trivial and self contained.  Note the offb
  patches outside of arch/powerpc, they are LE fixes for our
  open-firmware 'dumb' framebuffer"

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  powerpc: Fix up the kdump base cap to 128M
  powernv: Fix VFIO support with PHB3
  powerpc/52xx: Re-enable bestcomm driver in defconfigs
  powerpc/pasemi: Turn on devtmpfs in defconfig
  offb: Add palette hack for little endian
  offb: Little endian fixes
  powerpc: Fix PTE page address mismatch in pgtable ctor/dtor
  powerpc/44x: Fix ocm_block allocation
  powerpc: Fix build break with PPC_EARLY_DEBUG_BOOTX=y
  powerpc/512x: dts: remove misplaced IRQ spec from 'soc' node

offb: Add palette hack for little endian

2013-12-10T00:25:07+00:00

The pseudo palette color entries need to be ajusted for little
endian.

This patch byteswaps the values in the pseudo palette depending
on the host endian order and the screen depth.

Signed-off-by: Cédric Le Goater 
Signed-off-by: Benjamin Herrenschmidt

offb: Little endian fixes

2013-12-10T00:25:06+00:00

The "screen" properties : depth, width, height, linebytes need
to be converted to the host endian order when read from the device
tree.

The offb_init_palette_hacks() routine also made assumption on the
host endian order.

Signed-off-by: Cédric Le Goater 
Signed-off-by: Benjamin Herrenschmidt

video: vt8500: fix error handling in probe()

2013-12-04T08:50:16+00:00

We shouldn't kfree(fbi) because that was allocated with devm_kzalloc().
There were several error paths which returned directly instead of
releasing resources.

Signed-off-by: Dan Carpenter 
Signed-off-by: Tomi Valkeinen

atmel_lcdfb: fix module autoload

2013-12-04T08:48:12+00:00

Add missing module device table which is needed for module autoloading.

Signed-off-by: Johan Hovold 
Acked-by: Nicolas Ferre 
Signed-off-by: Tomi Valkeinen

fbdev: sh_mobile_meram: Fix defined but not used compiler warnings

2013-11-26T14:59:42+00:00

If both CONFIG_PM_SLEEP and CONFIG_PM_RUNTIME are not set:

drivers/video/sh_mobile_meram.c:573: warning: ‘sh_mobile_meram_suspend’ defined but not used
drivers/video/sh_mobile_meram.c:597: warning: ‘sh_mobile_meram_resume’ defined but not used

Signed-off-by: Geert Uytterhoeven 
Acked-by: Laurent Pinchart 
Signed-off-by: Tomi Valkeinen

video: kyro: fix incorrect sizes when copying to userspace

2013-11-26T14:40:14+00:00

kyro would copy u32s and specify sizeof(unsigned long) as the size to copy.

This would copy more data than intended and cause memory corruption and might
leak kernel memory.

Signed-off-by: Sasha Levin 
Signed-off-by: Tomi Valkeinen

ARM: OMAPFB: panel-sony-acx565akm: fix bad unlock balance

2013-11-26T10:49:17+00:00

When booting Nokia N900 smartphone with v3.12 + omap2plus_defconfig
(LOCKDEP enabled) and CONFIG_DISPLAY_PANEL_SONY_ACX565AKM enabled,
the following BUG is seen during the boot:

[    7.302154] =====================================
[    7.307128] [ BUG: bad unlock balance detected! ]
[    7.312103] 3.12.0-los.git-2093492-00120-g5e01dc7 #3 Not tainted
[    7.318450] -------------------------------------
[    7.323425] kworker/u2:1/12 is trying to release lock (&ddata->mutex) at:
[    7.330657] [] acx565akm_enable+0x12c/0x18c
[    7.335998] but there are no more locks to release!

Fix by removing double unlock and handling the locking completely inside
acx565akm_panel_power_on() when doing the power on.

Reported-by: Eduardo Valentin 
Signed-off-by: Aaro Koskinen 
Cc: stable@vger.kernel.org
Signed-off-by: Tomi Valkeinen