Merge branch 'work.tty-ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull tty ioctl updates from Al Viro:
 "This is the compat_ioctl work related to tty ioctls.

  Quite a bit of dead code taken out, all tty-related stuff gone from
  fs/compat_ioctl.c. A bunch of compat bugs fixed - some still remain,
  but all more or less generic tty-related ioctls should be covered
  (remaining issues are in things like driver-private ioctls in a pcmcia
  serial card driver not getting properly handled in 32bit processes on
  64bit host, etc)"

* 'work.tty-ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (53 commits)
  kill TIOCSERGSTRUCT
  change semantics of ldisc ->compat_ioctl()
  kill TIOCSER[SG]WILD
  synclink_gt(): fix compat_ioctl()
  pty: fix compat ioctls
  compat_ioctl - kill keyboard ioctl handling
  gigaset: add ->compat_ioctl()
  vt_compat_ioctl(): clean up, use compat_ptr() properly
  gigaset: don't try to printk userland buffer contents
  dgnc: don't bother with (empty) stub for TCXONC
  dgnc: leave TIOC[GS]SOFTCAR to ldisc
  remove fallback to drivers for TIOCGICOUNT
  dgnc: break-related ioctls won't reach ->ioctl()
  kill the rest of tty COMPAT_IOCTL() entries
  dgnc: TIOCM... won't reach ->ioctl()
  isdn_tty: TCSBRK{,P} won't reach ->ioctl()
  kill capinc_tty_ioctl()
  take compat TIOC[SG]SERIAL treatment into tty_compat_ioctl()
  synclink: reduce pointless checks in ->ioctl()
  complete ->[sg]et_serial() switchover
  ...

1 files changed, 9 insertions, 22 deletions

diff --git a/drivers/tty/vt/vt_ioctl.c b/drivers/tty/vt/vt_ioctl.c
index 73cdc0d633dd..8b0ed139592f 100644
--- a/drivers/tty/vt/vt_ioctl.c
+++ b/drivers/tty/vt/vt_ioctl.c
@@ -1175,17 +1175,13 @@ long vt_compat_ioctl(struct tty_struct *tty,
 {
 	struct vc_data *vc = tty->driver_data;
 	struct console_font_op op;	/* used in multiple places here */
-	unsigned int console;
-	void __user *up = (void __user *)arg;
+	unsigned int console = vc->vc_num;
+	void __user *up = compat_ptr(arg);
 	int perm;
-	int ret = 0;
 
-	console = vc->vc_num;
 
-	if (!vc_cons_allocated(console)) { 	/* impossible? */
-		ret = -ENOIOCTLCMD;
-		goto out;
-	}
+	if (!vc_cons_allocated(console)) 	/* impossible? */
+		return -ENOIOCTLCMD;
 
 	/*
 	 * To have permissions to do most of the vt ioctls, we either have
@@ -1201,17 +1197,14 @@ long vt_compat_ioctl(struct tty_struct *tty,
 	 */
 	case PIO_FONTX:
 	case GIO_FONTX:
-		ret = compat_fontx_ioctl(cmd, up, perm, &op);
-		break;
+		return compat_fontx_ioctl(cmd, up, perm, &op);
 
 	case KDFONTOP:
-		ret = compat_kdfontop_ioctl(up, perm, &op, vc);
-		break;
+		return compat_kdfontop_ioctl(up, perm, &op, vc);
 
 	case PIO_UNIMAP:
 	case GIO_UNIMAP:
-		ret = compat_unimap_ioctl(cmd, up, perm, vc);
-		break;
+		return compat_unimap_ioctl(cmd, up, perm, vc);
 
 	/*
 	 * all these treat 'arg' as an integer
@@ -1236,21 +1229,15 @@ long vt_compat_ioctl(struct tty_struct *tty,
 	case VT_DISALLOCATE:
 	case VT_RESIZE:
 	case VT_RESIZEX:
-		goto fallback;
+		return vt_ioctl(tty, cmd, arg);
 
 	/*
 	 * the rest has a compatible data structure behind arg,
 	 * but we have to convert it to a proper 64 bit pointer.
 	 */
 	default:
-		arg = (unsigned long)compat_ptr(arg);
-		goto fallback;
+		return vt_ioctl(tty, cmd, (unsigned long)up);
 	}
-out:
-	return ret;
-
-fallback:
-	return vt_ioctl(tty, cmd, arg);
 }