Merge branch 'master' into for-next

Sync up with Linus' tree to be able to apply Cesar's patch
against newer version of the code.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 70 insertions, 53 deletions

diff --git a/drivers/tty/hvc/hvc_vio.c b/drivers/tty/hvc/hvc_vio.c
index 56e97258e55a..1a5894c6dfa4 100644
--- a/drivers/tty/hvc/hvc_vio.c
+++ b/drivers/tty/hvc/hvc_vio.c
@@ -230,6 +230,69 @@ static const struct hv_ops hvterm_hvsi_ops = {
         .tiocmset = hvterm_hvsi_tiocmset,
 };
 
+static void udbg_hvc_putc(char c)
+{
+        int count = -1;
+
+        if (!hvterm_privs[0])
+                return;
+
+        if (c == '\n')
+                udbg_hvc_putc('\r');
+
+        do {
+                switch(hvterm_privs[0]->proto) {
+                case HV_PROTOCOL_RAW:
+                        count = hvterm_raw_put_chars(0, &c, 1);
+                        break;
+                case HV_PROTOCOL_HVSI:
+                        count = hvterm_hvsi_put_chars(0, &c, 1);
+                        break;
+                }
+        } while(count == 0);
+}
+
+static int udbg_hvc_getc_poll(void)
+{
+        int rc = 0;
+        char c;
+
+        if (!hvterm_privs[0])
+                return -1;
+
+        switch(hvterm_privs[0]->proto) {
+        case HV_PROTOCOL_RAW:
+                rc = hvterm_raw_get_chars(0, &c, 1);
+                break;
+        case HV_PROTOCOL_HVSI:
+                rc = hvterm_hvsi_get_chars(0, &c, 1);
+                break;
+        }
+        if (!rc)
+                return -1;
+        return c;
+}
+
+static int udbg_hvc_getc(void)
+{
+        int ch;
+
+        if (!hvterm_privs[0])
+                return -1;
+
+        for (;;) {
+                ch = udbg_hvc_getc_poll();
+                if (ch == -1) {
+                        /* This shouldn't be needed...but... */
+                        volatile unsigned long delay;
+                        for (delay=0; delay < 2000000; delay++)
+                                ;
+                } else {
+                        return ch;
+                }
+        }
+}
+
 static int __devinit hvc_vio_probe(struct vio_dev *vdev,
                                    const struct vio_device_id *id)
 {
@@ -289,6 +352,13 @@ static int __devinit hvc_vio_probe(struct vio_dev *vdev,
                 return PTR_ERR(hp);
         dev_set_drvdata(&vdev->dev, hp);
 
+        /* register udbg if it's not there already for console 0 */
+        if (hp->index == 0 && !udbg_putc) {
+                udbg_putc = udbg_hvc_putc;
+                udbg_getc = udbg_hvc_getc;
+                udbg_getc_poll = udbg_hvc_getc_poll;
+        }
+
         return 0;
 }
 
@@ -331,59 +401,6 @@ static void __exit hvc_vio_exit(void)
 }
 module_exit(hvc_vio_exit);
 
-static void udbg_hvc_putc(char c)
-{
-        int count = -1;
-
-        if (c == '\n')
-                udbg_hvc_putc('\r');
-
-        do {
-                switch(hvterm_priv0.proto) {
-                case HV_PROTOCOL_RAW:
-                        count = hvterm_raw_put_chars(0, &c, 1);
-                        break;
-                case HV_PROTOCOL_HVSI:
-                        count = hvterm_hvsi_put_chars(0, &c, 1);
-                        break;
-                }
-        } while(count == 0);
-}
-
-static int udbg_hvc_getc_poll(void)
-{
-        int rc = 0;
-        char c;
-
-        switch(hvterm_priv0.proto) {
-        case HV_PROTOCOL_RAW:
-                rc = hvterm_raw_get_chars(0, &c, 1);
-                break;
-        case HV_PROTOCOL_HVSI:
-                rc = hvterm_hvsi_get_chars(0, &c, 1);
-                break;
-        }
-        if (!rc)
-                return -1;
-        return c;
-}
-
-static int udbg_hvc_getc(void)
-{
-        int ch;
-        for (;;) {
-                ch = udbg_hvc_getc_poll();
-                if (ch == -1) {
-                        /* This shouldn't be needed...but... */
-                        volatile unsigned long delay;
-                        for (delay=0; delay < 2000000; delay++)
-                                ;
-                } else {
-                        return ch;
-                }
-        }
-}
-
 void __init hvc_vio_init_early(void)
 {
         struct device_node *stdout_node;