This patch unlocks the port lock before calling a serial_core API
and re-acquires the port lock after calling it.
This patch fixes a system freeze issue seen when the serial_core
API uart_write_wakeup() eventually attempts to acquire the port lock
already acquired by omap serial interrupt handler.
Tested-by: NShubhrajyoti D <shubhrajyoti@ti.com>
Signed-off-by: NRuchika Kharwar <ruchika@ti.com>
Signed-off-by: NPavan Savoy <pavan_savoy@ti.com>
Signed-off-by: NVijay Badawadagi <bvijay@ti.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>