linux-rp-2.6.22+2.6.23-rc4: Fix vt_ioctl race.

Because of a race between vt_ioctl and the console work queue, psplash 
was crashing.


git-svn-id: https://svn.o-hand.com/repos/poky/trunk@2812 311d38ba-8fff-0310-9ca6-ca027cbcb966

1 files changed, 40 insertions, 0 deletions

diff --git a/meta/packages/linux/linux-rp-2.6.22+2.6.23-rc4/vt_ioctl_race.patch b/meta/packages/linux/linux-rp-2.6.22+2.6.23-rc4/vt_ioctl_race.patch
new file mode 100644
index 0000000000..8f53b55a30
--- /dev/null
+++ b/meta/packages/linux/linux-rp-2.6.22+2.6.23-rc4/vt_ioctl_race.patch
@@ -0,0 +1,40 @@
+---
+ drivers/char/vt_ioctl.c |    4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+Index: linux-2.6.22/drivers/char/vt_ioctl.c
+===================================================================
+--- linux-2.6.22.orig/drivers/char/vt_ioctl.c   2007-07-09 01:32:17.000000000 +0200
++++ linux-2.6.22/drivers/char/vt_ioctl.c        2007-09-27 11:05:29.000000000 +0200
+@@ -770,6 +770,7 @@
+                /*
+                 * Switching-from response
+                 */
++               acquire_console_sem();
+                if (vc->vt_newvt >= 0) {
+                        if (arg == 0)
+                                /*
+@@ -784,7 +785,6 @@
+                                 * complete the switch.
+                                 */
+                                int newvt;
+-                               acquire_console_sem();
+                                newvt = vc->vt_newvt;
+                                vc->vt_newvt = -1;
+                                i = vc_allocate(newvt);
+@@ -798,7 +798,6 @@
+                                 * other console switches..
+                                 */
+                                complete_change_console(vc_cons[newvt].d);
+-                               release_console_sem();
+                        }
+                }
+ 
+@@ -813,6 +812,7 @@
+                        if (arg != VT_ACKACQ)
+                                return -EINVAL;
+                }
++               release_console_sem();
+ 
+                return 0;
+