diff options
| author | Michael Neuling <mikey@neuling.org> | 2006-03-25 17:30:00 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2006-03-27 14:49:48 +1100 |
| commit | 55aab8cd3a498201b769a19de861c77516bdfd45 (patch) | |
| tree | 1d05000e49324876872bb8e9deb0359379674616 | |
| parent | 1f5e3b028c5b592b5a792a390c78d609219aebfd (diff) | |
| download | linux-55aab8cd3a498201b769a19de861c77516bdfd45.tar.bz2 | |
[PATCH] powerpc: HVC init race
I've been hitting a crash on boot where tty_open is being called before the
hvc console driver setup is complete. This fixes the problem.
Thanks to benh for his help on this.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Acked-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
| -rw-r--r-- | drivers/char/hvc_console.c | 32 |
1 files changed, 18 insertions, 14 deletions
diff --git a/drivers/char/hvc_console.c b/drivers/char/hvc_console.c index f65b2e14a485..a94c5b0cac52 100644 --- a/drivers/char/hvc_console.c +++ b/drivers/char/hvc_console.c @@ -823,34 +823,38 @@ EXPORT_SYMBOL(hvc_remove); * interfaces start to become available. */ int __init hvc_init(void) { + struct tty_driver *drv; + /* We need more than hvc_count adapters due to hotplug additions. */ - hvc_driver = alloc_tty_driver(HVC_ALLOC_TTY_ADAPTERS); - if (!hvc_driver) + drv = alloc_tty_driver(HVC_ALLOC_TTY_ADAPTERS); + if (!drv) return -ENOMEM; - hvc_driver->owner = THIS_MODULE; - hvc_driver->devfs_name = "hvc/"; - hvc_driver->driver_name = "hvc"; - hvc_driver->name = "hvc"; - hvc_driver->major = HVC_MAJOR; - hvc_driver->minor_start = HVC_MINOR; - hvc_driver->type = TTY_DRIVER_TYPE_SYSTEM; - hvc_driver->init_termios = tty_std_termios; - hvc_driver->flags = TTY_DRIVER_REAL_RAW; - tty_set_operations(hvc_driver, &hvc_ops); + drv->owner = THIS_MODULE; + drv->devfs_name = "hvc/"; + drv->driver_name = "hvc"; + drv->name = "hvc"; + drv->major = HVC_MAJOR; + drv->minor_start = HVC_MINOR; + drv->type = TTY_DRIVER_TYPE_SYSTEM; + drv->init_termios = tty_std_termios; + drv->flags = TTY_DRIVER_REAL_RAW; + tty_set_operations(drv, &hvc_ops); /* Always start the kthread because there can be hotplug vty adapters * added later. */ hvc_task = kthread_run(khvcd, NULL, "khvcd"); if (IS_ERR(hvc_task)) { panic("Couldn't create kthread for console.\n"); - put_tty_driver(hvc_driver); + put_tty_driver(drv); return -EIO; } - if (tty_register_driver(hvc_driver)) + if (tty_register_driver(drv)) panic("Couldn't register hvc console driver\n"); + mb(); + hvc_driver = drv; return 0; } module_init(hvc_init); |