In commit 44a0c0190b500ee6bcfc0976fe540f65dee2cd67 unlocking of spin_locks has
been removed. This patch party restores this functionality.
Signed-off-by: Michael Thalmeier <michael.thalmeier@xxxxxxx>
---
drivers/usb/gadget/u_serial.c | 9 +++++++++
1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/gadget/u_serial.c b/drivers/usb/gadget/u_serial.c
index 40f7716..a925b9e 100644
--- a/drivers/usb/gadget/u_serial.c
+++ b/drivers/usb/gadget/u_serial.c
@@ -553,7 +553,16 @@ recycle:
* a workqueue, so we won't get callbacks and can hold port_lock
*/
if (tty && do_push) {
+ /*
+ * Drop the lock here since it might end up calling
+ * gs_flush_chars, which takes the lock.
+ */
+ spin_unlock_irq(&port->port_lock);
tty_flip_buffer_push(tty);
+ spin_lock_irq(&port->port_lock);
+
+ /* tty may have been closed */
+ tty = port->port_tty;
}
--
1.7.6.4
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