This patch depends on 72df17e... (PATCH 1). It restores the retreiving
of a protected instance of tty. As opposed to the serialcore.c
dcd_change implementation, the callers of dcd_change used to
get protected tty instance.
Signed-off-by: Paul Chavent <paul.chavent@xxxxxxxx>
---
drivers/usb/serial/generic.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c
index 33f1df1..91f0592 100644
--- a/drivers/usb/serial/generic.c
+++ b/drivers/usb/serial/generic.c
@@ -566,7 +566,7 @@ void usb_serial_handle_dcd_change(struct usb_serial_port *usb_port,
unsigned int status)
{
struct tty_port *port = &usb_port->port;
- struct tty_struct *tty = port->tty;
+ struct tty_struct *tty = tty_port_tty_get(port);
dev_dbg(&usb_port->dev, "%s - status %d\n", __func__, status);
@@ -574,6 +574,8 @@ void usb_serial_handle_dcd_change(struct usb_serial_port *usb_port,
wake_up_interruptible(&port->open_wait);
else if (tty && !C_CLOCAL(tty))
tty_hangup(tty);
+
+ tty_kref_put(tty);
}
EXPORT_SYMBOL_GPL(usb_serial_handle_dcd_change);
--
1.7.12.1
--
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