hvc_console: display printk messages on console.

printk only works for "registered consoles."  Currently, the hvc_console
code calls register_console() from hvc_instantiate(), but that's only
used in the early console case.  In hvc_alloc(), register_console() was
not called.

Add a call to register_console() in hvc_alloc(), set up the index in
the hvc_console, and set up the necessary vtermnos[] and cons_op[]
entries so that printk functions work.

Signed-off-by: Miche Baker-Harvey <miche@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c
index b6b2d18fa38d..7430bc3c8d53 100644
--- a/drivers/tty/hvc/hvc_console.c
+++ b/drivers/tty/hvc/hvc_console.c
@@ -852,7 +852,7 @@ struct hvc_struct *hvc_alloc(uint32_t vtermno, int data,
          * find index to use:
          * see if this vterm id matches one registered for console.
          */
-        for (i=0; i < MAX_NR_HVC_CONSOLES; i++)
+        for (i = 0; i < MAX_NR_HVC_CONSOLES; i++)
                 if (vtermnos[i] == hp->vtermno &&
                     cons_ops[i] == hp->ops)
                         break;
@@ -862,9 +862,13 @@ struct hvc_struct *hvc_alloc(uint32_t vtermno, int data,
                 i = ++last_hvc;
 
         hp->index = i;
+        hvc_console.index = i;
+        vtermnos[i] = vtermno;
+        cons_ops[i] = ops;
 
         list_add_tail(&(hp->next), &hvc_structs);
         spin_unlock(&hvc_structs_lock);
+        register_console(&hvc_console);
 
         return hp;
 }
@@ -875,6 +879,7 @@ int hvc_remove(struct hvc_struct *hp)
         unsigned long flags;
         struct tty_struct *tty;
 
+        unregister_console(&hvc_console);
         spin_lock_irqsave(&hp->lock, flags);
         tty = tty_kref_get(hp->tty);