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| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2014-06-05 16:33:24 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2014-06-06 22:19:47 +0200 |
| commit | f418f2ec440ab8c014f37539ef0b19271afb1186 (patch) | |
| tree | 0b782de26fc7615e964a80fc75052e12b05df0fc /drivers/tty/vt/vt.c | |
| parent | d9c660e750fdf982e1e2bdd0e76c1e6c4db4217b (diff) | |
| download | linux-f418f2ec440ab8c014f37539ef0b19271afb1186.tar.bz2 | |
vt: Don't ignore unbind errors in vt_unbind
Otherwise the loop will never stop since we don't make any
forward progress. Noticed while breaking this accidentally
in a painful attempt to make vga_con unregistering work.
With this patch we'll bail out on the first attempt, which
at least leaves a useful enough system behind for debugging.
Livelocks on console_lock just aren't fun.
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/tty/vt/vt.c')
| -rw-r--r-- | drivers/tty/vt/vt.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 5077fe87324d..3c00dcb3b145 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -3260,6 +3260,7 @@ static int vt_unbind(struct con_driver *con) { const struct consw *csw = NULL; int i, more = 1, first = -1, last = -1, deflt = 0; + int ret; if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) || con_is_graphics(con->con, con->first, con->last)) @@ -3285,8 +3286,10 @@ static int vt_unbind(struct con_driver *con) if (first != -1) { console_lock(); - do_unbind_con_driver(csw, first, last, deflt); + ret = do_unbind_con_driver(csw, first, last, deflt); console_unlock(); + if (ret != 0) + return ret; } first = -1; |