linux-toradex.git/drivers/video/xen-fbfront.c, branch v3.7.9

xen-fbfront: handle backend CLOSED without CLOSING

2012-10-30T13:28:17+00:00

Backend drivers shouldn't transistion to CLOSED unless the frontend is
CLOSED.  If a backend does transition to CLOSED too soon then the
frontend may not see the CLOSING state and will not properly shutdown.

So, treat an unexpected backend CLOSED state the same as CLOSING.

Acked-by: Florian Tobias Schandinat 
Signed-off-by: David Vrabel 
Signed-off-by: Konrad Rzeszutek Wilk

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