7 files changed, 46 insertions, 24 deletions

diff --git a/drivers/char/briq_panel.c b/drivers/char/briq_panel.c
index 8dcf9d20f449..c70d52ace8b2 100644
--- a/drivers/char/briq_panel.c
+++ b/drivers/char/briq_panel.c
@@ -202,13 +202,16 @@ static struct miscdevice briq_panel_miscdev = {
 
 static int __init briq_panel_init(void)
 {
-        struct device_node *root = find_path_device("/");
+        struct device_node *root = of_find_node_by_path("/");
         const char *machine;
         int i;
 
         machine = get_property(root, "model", NULL);
-        if (!machine || strncmp(machine, "TotalImpact,BRIQ-1", 18) != 0)
+        if (!machine || strncmp(machine, "TotalImpact,BRIQ-1", 18) != 0) {
+                of_node_put(root);
                 return -ENODEV;
+        }
+        of_node_put(root);
 
         printk(KERN_INFO
                 "briq_panel: v%s Dr. Karsten Jeppesen (kj@totalimpact.com)\n",
diff --git a/drivers/char/hvc_console.c b/drivers/char/hvc_console.c
index a0a88aa23f5b..0f9ed7b46a6d 100644
--- a/drivers/char/hvc_console.c
+++ b/drivers/char/hvc_console.c
@@ -47,8 +47,6 @@
 #define HVC_MAJOR       229
 #define HVC_MINOR       0
 
-#define TIMEOUT         (10)
-
 /*
  * Wait this long per iteration while trying to push buffered data to the
  * hypervisor before allowing the tty to complete a close operation.
@@ -104,12 +102,12 @@ static DEFINE_SPINLOCK(hvc_structs_lock);
 /*
  * This value is used to assign a tty->index value to a hvc_struct based
  * upon order of exposure via hvc_probe(), when we can not match it to
- * a console canidate registered with hvc_instantiate().
+ * a console candidate registered with hvc_instantiate().
  */
 static int last_hvc = -1;
 
 /*
- * Do not call this function with either the hvc_strucst_lock or the hvc_struct
+ * Do not call this function with either the hvc_structs_lock or the hvc_struct
  * lock held.  If successful, this function increments the kobject reference
  * count against the target hvc_struct so it should be released when finished.
  */
@@ -162,7 +160,7 @@ void hvc_console_print(struct console *co, const char *b, unsigned count)
         if (index >= MAX_NR_HVC_CONSOLES)
                 return;
 
-        /* This console adapter was removed so it is not useable. */
+        /* This console adapter was removed so it is not usable. */
         if (vtermnos[index] < 0)
                 return;
 
@@ -220,7 +218,7 @@ struct console hvc_con_driver = {
 };
 
 /*
- * Early console initialization.  Preceeds driver initialization.
+ * Early console initialization.  Precedes driver initialization.
  *
  * (1) we are first, and the user specified another driver
  * -- index will remain -1
@@ -257,7 +255,7 @@ int hvc_instantiate(uint32_t vtermno, int index, struct hv_ops *ops)
         if (vtermnos[index] != -1)
                 return -1;
 
-        /* make sure no no tty has been registerd in this index */
+        /* make sure no no tty has been registered in this index */
         hp = hvc_get_by_index(index);
         if (hp) {
                 kobject_put(&hp->kobj);
@@ -267,7 +265,7 @@ int hvc_instantiate(uint32_t vtermno, int index, struct hv_ops *ops)
         vtermnos[index] = vtermno;
         cons_ops[index] = ops;
 
-        /* reserve all indices upto and including this index */
+        /* reserve all indices up to and including this index */
         if (last_hvc < index)
                 last_hvc = index;
 
@@ -528,7 +526,7 @@ static int hvc_write(struct tty_struct *tty, const unsigned char *buf, int count
 
 /*
  * This is actually a contract between the driver and the tty layer outlining
- * how much write room the driver can guarentee will be sent OR BUFFERED.  This
+ * how much write room the driver can guarantee will be sent OR BUFFERED.  This
  * driver MUST honor the return value.
  */
 static int hvc_write_room(struct tty_struct *tty)
@@ -550,6 +548,18 @@ static int hvc_chars_in_buffer(struct tty_struct *tty)
         return hp->n_outbuf;
 }
 
+/*
+ * timeout will vary between the MIN and MAX values defined here.  By default
+ * and during console activity we will use a default MIN_TIMEOUT of 10.  When
+ * the console is idle, we increase the timeout value on each pass through
+ * msleep until we reach the max.  This may be noticeable as a brief (average
+ * one second) delay on the console before the console responds to input when
+ * there has been no input for some time.
+ */
+#define MIN_TIMEOUT             (10)
+#define MAX_TIMEOUT             (2000)
+static u32 timeout = MIN_TIMEOUT;
+
 #define HVC_POLL_READ   0x00000001
 #define HVC_POLL_WRITE  0x00000002
 
@@ -642,9 +652,14 @@ static int hvc_poll(struct hvc_struct *hp)
  bail:
         spin_unlock_irqrestore(&hp->lock, flags);
 
-        if (read_total)
+        if (read_total) {
+                /* Activity is occurring, so reset the polling backoff value to
+                   a minimum for performance. */
+                timeout = MIN_TIMEOUT;
+
                 tty_flip_buffer_push(tty);
-        
+        }
+
         return poll_mask;
 }
 
@@ -688,8 +703,12 @@ int khvcd(void *unused)
                 if (!hvc_kicked) {
                         if (poll_mask == 0)
                                 schedule();
-                        else
-                                msleep_interruptible(TIMEOUT);
+                        else {
+                                if (timeout < MAX_TIMEOUT)
+                                        timeout += (timeout >> 6) + 1;
+
+                                msleep_interruptible(timeout);
+                        }
                 }
                 __set_current_state(TASK_RUNNING);
         } while (!kthread_should_stop());
@@ -794,7 +813,7 @@ int __devexit hvc_remove(struct hvc_struct *hp)
 
         /*
          * We 'put' the instance that was grabbed when the kobject instance
-         * was intialized using kobject_init().  Let the last holder of this
+         * was initialized using kobject_init().  Let the last holder of this
          * kobject cause it to be removed, which will probably be the tty_hangup
          * below.
          */
@@ -850,7 +869,7 @@ int __init hvc_init(void)
 }
 module_init(hvc_init);
 
-/* This isn't particularily necessary due to this being a console driver
+/* This isn't particularly necessary due to this being a console driver
  * but it is nice to be thorough.
  */
 static void __exit hvc_exit(void)
diff --git a/drivers/char/hvc_iseries.c b/drivers/char/hvc_iseries.c
index f144a947bd17..ec420fe8a908 100644
--- a/drivers/char/hvc_iseries.c
+++ b/drivers/char/hvc_iseries.c
@@ -575,7 +575,7 @@ static int hvc_find_vtys(void)
                                 (num_found >= VTTY_PORTS))
                         break;
 
-                vtermno = get_property(vty, "reg", NULL);
+                vtermno = of_get_property(vty, "reg", NULL);
                 if (!vtermno)
                         continue;
 
diff --git a/drivers/char/hvc_vio.c b/drivers/char/hvc_vio.c
index f9c00844d2bf..94a542e20efb 100644
--- a/drivers/char/hvc_vio.c
+++ b/drivers/char/hvc_vio.c
@@ -153,7 +153,7 @@ static int hvc_find_vtys(void)
                 if (num_found >= MAX_NR_HVC_CONSOLES)
                         break;
 
-                vtermno = get_property(vty, "reg", NULL);
+                vtermno = of_get_property(vty, "reg", NULL);
                 if (!vtermno)
                         continue;
 
diff --git a/drivers/char/hvsi.c b/drivers/char/hvsi.c
index 50315d6364fd..d5a752da322f 100644
--- a/drivers/char/hvsi.c
+++ b/drivers/char/hvsi.c
@@ -1279,8 +1279,8 @@ static int __init hvsi_console_init(void)
                 struct hvsi_struct *hp;
                 const uint32_t *vtermno, *irq;
 
-                vtermno = get_property(vty, "reg", NULL);
-                irq = get_property(vty, "interrupts", NULL);
+                vtermno = of_get_property(vty, "reg", NULL);
+                irq = of_get_property(vty, "interrupts", NULL);
                 if (!vtermno || !irq)
                         continue;
 
diff --git a/drivers/char/tpm/tpm_atmel.h b/drivers/char/tpm/tpm_atmel.h
index aefd683c60b7..3c852009196e 100644
--- a/drivers/char/tpm/tpm_atmel.h
+++ b/drivers/char/tpm/tpm_atmel.h
@@ -53,8 +53,8 @@ static void __iomem * atmel_get_base_addr(unsigned long *base, int *region_size)
         }
 
         reg = get_property(dn, "reg", &reglen);
-        naddrc = prom_n_addr_cells(dn);
-        nsizec = prom_n_size_cells(dn);
+        naddrc = of_n_addr_cells(dn);
+        nsizec = of_n_size_cells(dn);
 
         of_node_put(dn);
 
diff --git a/drivers/char/watchdog/Kconfig b/drivers/char/watchdog/Kconfig
index e812aa129e28..60198a78974c 100644
--- a/drivers/char/watchdog/Kconfig
+++ b/drivers/char/watchdog/Kconfig
@@ -548,7 +548,7 @@ config MV64X60_WDT
         depends on WATCHDOG && MV64X60
 
 config BOOKE_WDT
-        tristate "PowerPC Book-E Watchdog Timer"
+        bool "PowerPC Book-E Watchdog Timer"
         depends on WATCHDOG && (BOOKE || 4xx)
         ---help---
           Please see Documentation/watchdog/watchdog-api.txt for