openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

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>
This commit is contained in:
Miche Baker-Harvey 2011-10-05 10:48:51 -07:00 committed by Greg Kroah-Hartman
parent 53d785ccd9
commit 361162459f
1 changed files with 6 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/tty/hvc/hvc_console.c
View File

@ -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);