linux-toradex.git/drivers/video/xen-fbfront.c, branch v3.4.23

drivers/video/xen-fbfront.c: add missing cleanup code

2012-05-07T10:41:56+00:00

The operations in the subsequent error-handling code appear to be also
useful here.

Acked-by: Florian Tobias Schandinat 
Signed-off-by: Julia Lawall 
[v1: Collapse some of the error handling functions]
[v2: Fix compile warning]
Signed-off-by: Konrad Rzeszutek Wilk

Xen: consolidate and simplify struct xenbus_driver instantiation

2012-01-04T22:01:17+00:00

The 'name', 'owner', and 'mod_name' members are redundant with the
identically named fields in the 'driver' sub-structure. Rather than
switching each instance to specify these fields explicitly, introduce
a macro to simplify this.

Eliminate further redundancy by allowing the drvname argument to
DEFINE_XENBUS_DRIVER() to be blank (in which case the first entry from
the ID table will be used for .driver.name).

Also eliminate the questionable xenbus_register_{back,front}end()
wrappers - their sole remaining purpose was the checking of the
'owner' field, proper setting of which shouldn't be an issue anymore
when the macro gets used.

v2: Restore DRV_NAME for the driver name in xen-pciback.

Signed-off-by: Jan Beulich 
Cc: Jens Axboe 
Cc: Dmitry Torokhov 
Cc: Florian Tobias Schandinat 
Cc: Ian Campbell 
Cc: David S. Miller 
Signed-off-by: Konrad Rzeszutek Wilk

video: Convert vmalloc/memset to vzalloc

2011-06-02T08:25:35+00:00

Signed-off-by: Joe Perches 
Acked-by: Konrad Rzeszutek Wilk 
Signed-off-by: Paul Mundt

console: rename acquire/release_console_sem() to console_lock/unlock()

2011-01-26T00:50:06+00:00

The -rt patches change the console_semaphore to console_mutex.  As a
result, a quite large chunk of the patches changes all
acquire/release_console_sem() to acquire/release_console_mutex()

This commit makes things use more neutral function names which dont make
implications about the underlying lock.

The only real change is the return value of console_trylock which is
inverted from try_acquire_console_sem()

This patch also paves the way to switching console_sem from a semaphore to
a mutex.

[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: make console_trylock return 1 on success, per Geert]
Signed-off-by: Torben Hohn 
Cc: Thomas Gleixner 
Cc: Greg KH 
Cc: Ingo Molnar 
Cc: Geert Uytterhoeven 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge branch 'stable/bug-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen

2011-01-10T16:48:46+00:00

* 'stable/bug-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen/event: validate irq before get evtchn by irq
  xen/fb: fix potential memory leak
  xen/fb: fix xenfb suspend/resume race.
  xen: disable ACPI NUMA for PV guests
  xen/irq: Cleanup the find_unbound_irq

xen/fb: fix potential memory leak

2011-01-10T15:46:31+00:00

This patch fixes a potential memory leak when xenfb connect to
the backend fails.

Thanks for Ian's review and comments.

[v2: reworded the commit message a bit]

Signed-off-by: Konrad Rzeszutek Wilk 
Signed-off-by: Joe Jin 
Tested-by: Gurudas Pai 
Acked-by: Ian Campbell 
Cc: Jeremy Fitzhardinge 
Cc: Andrew Morton

xen/fb: fix xenfb suspend/resume race.

2011-01-10T15:46:30+00:00

When migrating guests over a long period we hit this:

<1>BUG: unable to handle kernel paging request at 0000000b819fdb98
<1>IP: [] notify_remote_via_irq+0x13/0x34
<4>PGD 94b10067 PUD 0
<0>Oops: 0000 [#1] SMP
.. snip..
Call Trace:
 [] xenfb_send_event+0x5c/0x5e
 [] ? xen_restore_fl_direct_end+0x0/0x1
 [] ? _spin_unlock_irqrestore+0x16/0x18
 [] xenfb_refresh+0x1b1/0x1d7
 [] ? sys_imageblit+0x1ac/0x458
 [] xenfb_imageblit+0x2f/0x34
 [] soft_cursor+0x1b5/0x1c8
 [] bit_cursor+0x4b6/0x4d7
 [] ? xen_restore_fl_direct_end+0x0/0x1
 [] ? _spin_unlock_irqrestore+0x16/0x18
 [] ? bit_cursor+0x0/0x4d7
 [] fb_flashcursor+0xff/0x111
 [] ? fb_flashcursor+0x0/0x111
 [] worker_thread+0x14d/0x1ed
 [] ? autoremove_wake_function+0x0/0x3d
 [] ? _spin_unlock_irqrestore+0x16/0x18
 [] ? worker_thread+0x0/0x1ed
 [] kthread+0x6e/0x76
 [] child_rip+0xa/0x20
 [] ? int_ret_from_sys_call+0x7/0x1b
 [] ? retint_restore_args+0x5/0x6
 [] ? child_rip+0x0/0x20
Code: 6b ff 0c 8b 87 a4 db 9f 81 66 85 c0 74 08 0f b7 f8 e8 3b ff ff ff c9
c3 55 48 89 e5 48 83 ec 10 0f 1f 44 00 00 89 ff 48 6b ff 0c <8b> 87 a4 db 9f
81 66 85 c0 74 14 48 8d 75 f0 0f b7 c0 bf 04 00
RIP  [] notify_remote_via_irq+0x13/0x34
 RSP 
CR2: 0000000b819fdb98
---[ end trace 098b4b74827595d0 ]---

The root cause of the panic is the race between the resume and reconnect to the backend.

Clearing the 'update_wanted' flag of xenfb before disconnecting from the
backend fixes this issue.

Signed-off-by: Joe Jin 
Signed-off-by: Konrad Rzeszutek Wilk 
Tested-by: Gurudas Pai 
Acked-by: Ian Campbell 
Cc: Jeremy Fitzhardinge 
Cc: Andrew Morton

VIDEO: xen-fb, switch to for_each_console

2010-11-16T20:50:17+00:00

Use newly added for_each_console for iterating consoles.

Signed-off-by: Jiri Slaby 
Cc: Jeremy Fitzhardinge 
Cc: Chris Wright 
Cc: virtualization@lists.osdl.org
Cc: xen-devel@lists.xensource.com
Cc: linux-fbdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman

xenbus: prevent warnings on unhandled enumeration values

2010-10-18T14:49:36+00:00

XenbusStateReconfiguring/XenbusStateReconfigured were introduced by
c/s 437, but aren't handled in many switch statements.

.. also pulled from the linux-2.6-sparse-tree tree.

Signed-off-by: Jan Beulich 
Signed-off-by: Konrad Rzeszutek Wilk 
Signed-off-by: Jeremy Fitzhardinge

x86: early PV on HVM features initialization.

2010-07-22T23:45:35+00:00

Initialize basic pv on hvm features adding a new Xen HVM specific
hypervisor_x86 structure.

Don't try to initialize xen-kbdfront and xen-fbfront when running on HVM
because the backends are not available.

Signed-off-by: Stefano Stabellini 
Signed-off-by: Sheng Yang 
Signed-off-by: Yaozu (Eddie) Dong 
Signed-off-by: Jeremy Fitzhardinge