xen: Enable console tty by default in domU if it's not a dummy

[linux-2.6-omap-h63xx.git] / drivers / video / xen-fbfront.c

diff --git a/drivers/video/xen-fbfront.c b/drivers/video/xen-fbfront.c
index 619a6f8d65a22c20b36395fe4d4d1ba2d89c7729..4e10876e62fc98d3bb68f5abd65a0fb467dc70a2 100644 (file)
--- a/drivers/video/xen-fbfront.c
+++ b/drivers/video/xen-fbfront.c
@@ -18,6 +18,7 @@
  * frame buffer.
  */
 
+#include <linux/console.h>
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/fb.h>
@@ -48,6 +49,7 @@ struct xenfb_info {
 
 static u32 xenfb_mem_len = XENFB_WIDTH * XENFB_HEIGHT * XENFB_DEPTH / 8;
 
+static void xenfb_make_preferred_console(void);
 static int xenfb_remove(struct xenbus_device *);
 static void xenfb_init_shared_page(struct xenfb_info *);
 static int xenfb_connect_backend(struct xenbus_device *, struct xenfb_info *);
@@ -348,6 +350,7 @@ static int __devinit xenfb_probe(struct xenbus_device *dev,
        if (ret < 0)
                goto error;
 
+       xenfb_make_preferred_console();
        return 0;
 
  error_nomem:
@@ -358,6 +361,28 @@ static int __devinit xenfb_probe(struct xenbus_device *dev,
        return ret;
 }
 
+static __devinit void
+xenfb_make_preferred_console(void)
+{
+       struct console *c;
+
+       if (console_set_on_cmdline)
+               return;
+
+       acquire_console_sem();
+       for (c = console_drivers; c; c = c->next) {
+               if (!strcmp(c->name, "tty") && c->index == 0)
+                       break;
+       }
+       release_console_sem();
+       if (c) {
+               unregister_console(c);
+               c->flags |= CON_CONSDEV;
+               c->flags &= ~CON_PRINTBUFFER; /* don't print again */
+               register_console(c);
+       }
+}
+
 static int xenfb_resume(struct xenbus_device *dev)
 {
        struct xenfb_info *info = dev->dev.driver_data;