TTY/Serial merge for 3.11-rc1

Here is the big TTY / Serial driver merge for 3.11-rc1.
 
 It's not all that big, nothing major changed in the tty api, which is a
 nice change, just a number of serial driver fixes and updates and new
 drivers, along with some n_tty fixes to help resolve some reported
 issues.
 
 All of these have been in the linux-next releases for a while, with the
 exception of the last revert patch, which was reported this past weekend
 by two different people as being needed.
 
 Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Merge tag 'tty-3.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial updates from Greg KH:
 "Here is the big TTY / Serial driver merge for 3.11-rc1.

  It's not all that big, nothing major changed in the tty api, which is
  a nice change, just a number of serial driver fixes and updates and
  new drivers, along with some n_tty fixes to help resolve some reported
  issues.

  All of these have been in the linux-next releases for a while, with
  the exception of the last revert patch, which was reported this past
  weekend by two different people as being needed."

* tag 'tty-3.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (51 commits)
  Revert "serial: 8250_pci: add support for another kind of NetMos Technology PCI 9835 Multi-I/O Controller"
  pch_uart: Add uart_clk selection for the MinnowBoard
  tty: atmel_serial: prepare clk before calling enable
  tty: Reset itty for other pty
  n_tty: Buffer work should not reschedule itself
  n_tty: Fix unsafe update of available buffer space
  n_tty: Untangle read completion variables
  n_tty: Encapsulate minimum_to_wake within N_TTY
  serial: omap: Fix device tree based PM runtime
  serial: imx: Fix serial clock unbalance
  serial/mpc52xx_uart: fix kernel panic when system reboot
  serial: mfd: Add sysrq support
  serial: imx: enable the clocks for console
  tty: serial: add Freescale lpuart driver support
  serial: imx: Improve Kconfig text
  serial: imx: Allow module build
  serial: imx: Fix warning when !CONFIG_SERIAL_IMX_CONSOLE
  tty/serial/sirf: fix error propagation in sirfsoc_uart_probe()
  serial: omap: fix potential NULL pointer dereference in serial_omap_runtime_suspend()
  tty: serial: Enable uartlite for ARM zynq
  ...

drivers/video/console/fbcon.c

@@ -556,34 +556,6 @@ static int do_fbcon_takeover(int show_logo)
 	return err;
 }
 
-static int fbcon_takeover(int show_logo)
-{
-	int err, i;
-
-	if (!num_registered_fb)
-		return -ENODEV;
-
-	if (!show_logo)
-		logo_shown = FBCON_LOGO_DONTSHOW;
-
-	for (i = first_fb_vc; i <= last_fb_vc; i++)
-		con2fb_map[i] = info_idx;
-
-	err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
-				fbcon_is_default);
-
-	if (err) {
-		for (i = first_fb_vc; i <= last_fb_vc; i++) {
-			con2fb_map[i] = -1;
-		}
-		info_idx = -1;
-	} else {
-		fbcon_has_console_bind = 1;
-	}
-
-	return err;
-}
-
 #ifdef MODULE
 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 			       int cols, int rows, int new_cols, int new_rows)
@@ -901,7 +873,7 @@ static int set_con2fb_map(int unit, int newidx, int user)
 /*
  *  Low Level Operations
  */
-/* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
+/* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */
 static int var_to_display(struct display *disp,
 			  struct fb_var_screeninfo *var,
 			  struct fb_info *info)
@@ -3543,8 +3515,9 @@ static void fbcon_start(void)
 			}
 		}
 
+		do_fbcon_takeover(0);
 		console_unlock();
-		fbcon_takeover(0);
+
 	}
 }
 
@@ -3648,8 +3621,8 @@ static void __exit fb_console_exit(void)
 	fbcon_deinit_device();
 	device_destroy(fb_class, MKDEV(0, 0));
 	fbcon_exit();
+	do_unregister_con_driver(&fb_con);
 	console_unlock();
-	unregister_con_driver(&fb_con);
 }	
 
 module_exit(fb_console_exit);

drivers/video/console/mdacon.c

@@ -585,10 +585,14 @@ static const struct consw mda_con = {
 
 int __init mda_console_init(void)
 {
+	int err;
+
 	if (mda_first_vc > mda_last_vc)
 		return 1;
-
-	return take_over_console(&mda_con, mda_first_vc-1, mda_last_vc-1, 0);
+	console_lock();
+	err = do_take_over_console(&mda_con, mda_first_vc-1, mda_last_vc-1, 0);
+	console_unlock();
+	return err;
 }
 
 static void __exit mda_console_exit(void)

drivers/video/console/newport_con.c

@@ -297,7 +297,7 @@ static void newport_exit(void)
 		newport_set_def_font(i, NULL);
 }
 
-/* Can't be __init, take_over_console may call it later */
+/* Can't be __init, do_take_over_console may call it later */
 static const char *newport_startup(void)
 {
 	int i;
@@ -746,6 +746,7 @@ static int newport_probe(struct gio_device *dev,
 			 const struct gio_device_id *id)
 {
 	unsigned long newport_addr;
+	int err;
 
 	if (!dev->resource.start)
 		return -EINVAL;
@@ -759,8 +760,10 @@ static int newport_probe(struct gio_device *dev,
 
 	npregs = (struct newport_regs *)/* ioremap cannot fail */
 		ioremap(newport_addr, sizeof(struct newport_regs));
-
-	return take_over_console(&newport_con, 0, MAX_NR_CONSOLES - 1, 1);
+	console_lock();
+	err = do_take_over_console(&newport_con, 0, MAX_NR_CONSOLES - 1, 1);
+	console_unlock();
+	return err;
 }
 
 static void newport_remove(struct gio_device *dev)

drivers/video/console/sticon.c

@@ -372,6 +372,7 @@ static const struct consw sti_con = {
 
 static int __init sticonsole_init(void)
 {
+    int err;
     /* already initialized ? */
     if (sticon_sti)
 	 return 0;
@@ -382,7 +383,10 @@ static int __init sticonsole_init(void)
 
     if (conswitchp == &dummy_con) {
 	printk(KERN_INFO "sticon: Initializing STI text console.\n");
-	return take_over_console(&sti_con, 0, MAX_NR_CONSOLES - 1, 1);
+	console_lock();
+	err = do_take_over_console(&sti_con, 0, MAX_NR_CONSOLES - 1, 1);
+	console_unlock();
+	return err;
     }
     return 0;
 }