tree e3a8be37e9e97bb8e232fbe6bd7823799e6899c1
parent 2ccdd1e77da52ad494e9af46bf272d816830cb28
author Thomas Gleixner <tglx@linutronix.de> 1180472030 +0100
committer Russell King <rmk+kernel@arm.linux.org.uk> 1180531981 +0100

[ARM] 4417/1: Serial: Fix AMBA drivers locking

The -rt patch triggered a lockdep warning in the amba serial drivers, which never
shows up on UP kernels. On SMP systems this would trigger as well.

Release the port lock before calling tty_flip_buffer_push() and reacquire it after
the call. This matches the code in the 8250 serial driver.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>