[PATCH] fix usb_serial_put synchronization

[Benny Halevy]

Signed-off-by: Benny Halevy <bhalevy@xxxxxxxxxxxxxxx>
---
 drivers/usb/serial/usb-serial.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 87f3788..4e5b996 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -120,11 +120,9 @@ static void return_serial(struct usb_serial *serial)
 	if (serial == NULL)
 		return;
 
-	spin_lock(&table_lock);
 	for (i = 0; i < serial->num_ports; ++i) {
 		serial_table[serial->minor + i] = NULL;
 	}
-	spin_unlock(&table_lock);
 }
 
 static void destroy_serial(struct kref *kref)
@@ -172,7 +170,9 @@ static void destroy_serial(struct kref *kref)
 
 void usb_serial_put(struct usb_serial *serial)
 {
+	spin_lock(&table_lock);
 	kref_put(&serial->kref, destroy_serial);
+	spin_unlock(&table_lock);
 }
 
 /*****************************************************************************

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/