* [PATCH] tty: Allow uart_register/unregister/register
@ 2012-05-14 13:51 Alan Cox
0 siblings, 0 replies; only message in thread
From: Alan Cox @ 2012-05-14 13:51 UTC (permalink / raw)
To: greg, linux-serial
From: Alan Cox <alan@linux.intel.com>
This is legitimate but because we don't clear the drv->state pointer in the
unregister code causes a bogus BUG().
Resolves-bug: https://bugzilla.kernel.org/show_bug.cgi?id=42880
Signed-off-by: Alan Cox <alan@linux.intel.com>
---
drivers/tty/serial/serial_core.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 9c4c05b..246b823 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -2282,6 +2282,7 @@ void uart_unregister_driver(struct uart_driver *drv)
tty_unregister_driver(p);
put_tty_driver(p);
kfree(drv->state);
+ drv->state = NULL;
drv->tty_driver = NULL;
}
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2012-05-14 13:51 [PATCH] tty: Allow uart_register/unregister/register Alan Cox
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