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[PATCH] hvc_console: start kernel thread before registering tty

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Its possible that we can write to the hvc_console tty as soon it is
registered.  Recently this started happening due to (what looks like) a
change to the hotplug code.

Unfortunately at this stage we have not started the khvcd kernel thread and
oops.  The solution is to start the kernel thread before registering the
tty.

Signed-off-by: Anton Blanchard <[email protected]>
Cc: Paul Mackerras <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Anton Blanchard authored and Linus Torvalds committed 2005-09-14 14:34:17 -07:00
1 parent 8b7fc4214b
commit ef4cbee0b0
1 file changed
+3 -3
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drivers/char/hvc_console.c
+3 -3
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@@ -839,9 +839,6 @@ int __init hvc_init(void)
hvc_driver->flags = TTY_DRIVER_REAL_RAW;
tty_set_operations(hvc_driver, &hvc_ops);
if (tty_register_driver(hvc_driver))
panic("Couldn't register hvc console driver\n");
/* Always start the kthread because there can be hotplug vty adapters
* added later. */
hvc_task = kthread_run(khvcd, NULL, "khvcd");
@@ -851,6 +848,9 @@ int __init hvc_init(void)
return -EIO;
}
if (tty_register_driver(hvc_driver))
panic("Couldn't register hvc console driver\n");
return 0;
}
module_init(hvc_init);