xen/hvc: allow xenboot console to be used again

Commit d0380e6c3c0f6edb986d8798a23acfaf33d5df23 (early_printk:
consolidate random copies of identical code) added in 3.10 introduced
a check for con->index == -1 in early_console_register().

Initialize index to -1 for the xenboot console so earlyprintk=xen
works again.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/hvc/hvc_xen.c b/drivers/tty/hvc/hvc_xen.c
index e61c36cbb866474841f9bdf92d934d3c5ece137a..c193af6a628f45758a7fcd59b1b0823e57327655 100644 (file)
--- a/drivers/tty/hvc/hvc_xen.c
+++ b/drivers/tty/hvc/hvc_xen.c
@@ -636,6 +636,7 @@ struct console xenboot_console = {
        .name           = "xenboot",
        .write          = xenboot_write_console,
        .flags          = CON_PRINTBUFFER | CON_BOOT | CON_ANYTIME,
+       .index          = -1,
 };
 #endif /* CONFIG_EARLY_PRINTK */