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| author | Alan Cox <alan@lxorguk.ukuu.org.uk> | 2008-04-30 00:53:25 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-30 08:29:40 -0700 |
| commit | dd9a451aad4fd7d5f46d2300c0e4fb70d8914453 (patch) | |
| tree | 1340cdb2e4ae943af536957d418f5fd5424d0dae | |
| parent | 1f8cabb7055b98300aa0798ee0f6513dfc130cc2 (diff) | |
| download | linux-3.10-dd9a451aad4fd7d5f46d2300c0e4fb70d8914453.tar.gz linux-3.10-dd9a451aad4fd7d5f46d2300c0e4fb70d8914453.tar.bz2 linux-3.10-dd9a451aad4fd7d5f46d2300c0e4fb70d8914453.zip | |
viocons: BKL locking
For some weird reason I can't ascertain (translation "I think its
broken") the viocons driver calls directly into the n_tty ldisc code even
if another ldisc is in use. It'll probably break if you do that but I'm
just fixing the locking and adding a comment that its horked.
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/char/viocons.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/char/viocons.c b/drivers/char/viocons.c index 8de6b95aeb8..9319c63dda9 100644 --- a/drivers/char/viocons.c +++ b/drivers/char/viocons.c @@ -704,8 +704,11 @@ static int viotty_ioctl(struct tty_struct *tty, struct file *file, case KDSKBLED: return 0; } - - return n_tty_ioctl(tty, file, cmd, arg); + /* FIXME: WTF is this being called for ??? */ + lock_kernel(); + ret = n_tty_ioctl(tty, file, cmd, arg); + unlock_kernel(); + return ret; } /* |