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Commit 611e0d83 authored by Peter Hurley's avatar Peter Hurley Committed by Greg Kroah-Hartman
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serial: 8250: Wait for irq to complete before shutdown 



After masking all interrupts, wait for the irq handler to complete
before continuing shutdown.

Signed-off-by: default avatarPeter Hurley <peter@hurleysoftware.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent d70a7b16

drivers/tty/serial/8250/8250_port.c

+4 −0
Original line number Diff line number Diff line
@@ -2088,8 +2088,12 @@ void serial8250_do_shutdown(struct uart_port *port) 
	/*

	 * Disable interrupts from this port

	 */

	spin_lock_irqsave(&port->lock, flags);

	up->ier = 0;

	serial_port_out(port, UART_IER, 0);

	spin_unlock_irqrestore(&port->lock, flags);



	synchronize_irq(port->irq);



	if (up->dma)

		serial8250_release_dma(up);