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| author | Jason Wessel <jason.wessel@windriver.com> | 2010-12-01 13:01:01 -0600 |
|---|---|---|
| committer | Jason Wessel <jason.wessel@windriver.com> | 2010-12-13 22:44:03 -0600 |
| commit | 8863ada9c47503bb93eba5e3a9ba88e6311db31f (patch) | |
| tree | 11a6804da54266ec7cc219d25fccf02049d8838b /drivers/serial | |
| parent | e8a7e48bb248a1196484d3f8afa53bded2b24e71 (diff) | |
| download | linux-8863ada9c47503bb93eba5e3a9ba88e6311db31f.tar.gz linux-8863ada9c47503bb93eba5e3a9ba88e6311db31f.tar.bz2 linux-8863ada9c47503bb93eba5e3a9ba88e6311db31f.zip | |
kgdboc,input: Fix regression with keyboard release key and early debugging
The commit 111c182340cd22e238ab1cc6564df336c6ebd7cb (kgdboc: reset
input devices (keyboards) when exiting debugger) introduced a
regression in early debugging such that you get a kernel oops on
continue (with the go command) if you boot a kernel with:
earlyprintk=vga ekgdboc=kbd kgdbwait
The restore kgdboc_restore_input() routine schedules work for the
purpose of sending key release events for any keys that were in the
depressed state prior to entering the kernel debugger. A simple fix
to the crash is to not invoke the schedule_work() if the kernel
system_state is anything other than SYSTEM_RUNNING.
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Sergei Shtylyov <sshtylyov@mvista.com>
Diffstat (limited to 'drivers/serial')
| -rw-r--r-- | drivers/serial/kgdboc.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/serial/kgdboc.c b/drivers/serial/kgdboc.c index 3374618300af..25a8bc565f40 100644 --- a/drivers/serial/kgdboc.c +++ b/drivers/serial/kgdboc.c @@ -90,7 +90,8 @@ static DECLARE_WORK(kgdboc_restore_input_work, kgdboc_restore_input_helper); static void kgdboc_restore_input(void) { - schedule_work(&kgdboc_restore_input_work); + if (likely(system_state == SYSTEM_RUNNING)) + schedule_work(&kgdboc_restore_input_work); } static int kgdboc_register_kbd(char **cptr) |