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Commit b7a7e14f authored by Matt Schulte's avatar Matt Schulte Committed by Greg Kroah-Hartman
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serial: Optimization: check for presence of UPF_EXAR_EFR flag before serial_in 



Optimization: check for presence of UPF_EXAR_EFR flag before serial_in

Signed-off-by: default avatarMatt Schulte <matts@commtech-fastcom.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent d02f8155

drivers/tty/serial/8250/8250.c

+3 −3
Original line number Original line Diff line number Diff line
@@ -911,9 +911,9 @@ static void autoconfig_16550a(struct uart_8250_port *up) 
	 * found at offset 0x09. Instead check the Deice ID (DVID)

	 * found at offset 0x09. Instead check the Deice ID (DVID)

	 * register for a 2, 4 or 8 port UART.

	 * register for a 2, 4 or 8 port UART.

	 */

	 */

	if (up->port.flags & UPF_EXAR_EFR) {

		status1 = serial_in(up, UART_EXAR_DVID);

		status1 = serial_in(up, UART_EXAR_DVID);

		if (status1 == 0x82 || status1 == 0x84 || status1 == 0x88) {

		if (status1 == 0x82 || status1 == 0x84 || status1 == 0x88) {

		if (up->port.flags & UPF_EXAR_EFR) {

			DEBUG_AUTOCONF("Exar XR17V35x ");

			DEBUG_AUTOCONF("Exar XR17V35x ");

			up->port.type = PORT_XR17V35X;

			up->port.type = PORT_XR17V35X;

			up->capabilities |= UART_CAP_AFE | UART_CAP_EFR |

			up->capabilities |= UART_CAP_AFE | UART_CAP_EFR |