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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-11-06 22:22:16 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-11-06 22:22:16 -0800 |
| commit | 31555213f03bca37d2c02e10946296052f4ecfcd (patch) | |
| tree | 8fdd0ad6f3171fe493b2888616997df29abd4b34 /drivers/tty | |
| parent | 0084e4751e63a71b30f315710f976f8bb0c2cc07 (diff) | |
| download | linux-31555213f03bca37d2c02e10946296052f4ecfcd.tar.bz2 | |
Revert "hvc_console: display printk messages on console."
This reverts commit 361162459f62dc0826b82c9690a741a940f457f0.
It causes an infinite loop when booting Linux under Xen, as so:
[ 2.382984] console [hvc0] enabled
[ 2.382984] console [hvc0] enabled
[ 2.382984] console [hvc0] enabled
...
as reported by Konrad Rzeszutek Wilk. And Rusty reports the same for
lguest. He goes on to say:
"This is not a concurrency problem: the issue seems to be that
calling register_console() twice on the same struct console is a bad
idea."
and Greg says he'll fix it up properly at some point later. Revert for now.
Reported-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reported-by: Rusty Russell <rusty@ozlabs.org>
Requested-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Miche Baker-Harvey <miche@google.com>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/hvc/hvc_console.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c index 7430bc3c8d53..b6b2d18fa38d 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; @@ -862,13 +862,9 @@ 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; } @@ -879,7 +875,6 @@ 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); |