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tty: serial: 8250_core.c Bug fix for Exar chips.

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The sleep function was updated to put the serial port to sleep only when necessary.
This appears to resolve the errant behavior of the driver as described in
Kernel Bug 61961 – "My Exar Corp. XR17C/D152 Dual PCI UART modem does not
work with 3.8.0".

Signed-off-by: Michael Welling <mwelling@ieee.org>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Michael Welling 2014-04-25 19:27:48 -05:00 committed by Greg Kroah-Hartman
parent d1db0eea85
commit b790f210fe
1 changed files with 1 additions and 1 deletions
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2
drivers/tty/serial/8250/8250_core.c
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@ -555,7 +555,7 @@ static void serial8250_set_sleep(struct uart_8250_port *p, int sleep)
*/
if ((p->port.type == PORT_XR17V35X) ||
(p->port.type == PORT_XR17D15X)) {
serial_out(p, UART_EXAR_SLEEP, 0xff);
serial_out(p, UART_EXAR_SLEEP, sleep ? 0xff : 0);
return;
}