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serial: 8250: Get RSA resource iff CONFIG_SERIAL_8250_RSA 

Support for Remote Supervisor Adapter is conditional on
CONFIG_SERIAL_8250_RSA; only attempt RSA resource acquire if
defined.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Peter Hurley 2015-02-24 14:25:12 -05:00 committed by Greg Kroah-Hartman
parent d53e1428a9
commit cd52b7599c
1 changed files with 10 additions and 0 deletions
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10
drivers/tty/serial/8250/8250_core.c
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@ -2797,6 +2797,7 @@ static void serial8250_release_std_resource(struct uart_8250_port *up)
}
}
#ifdef CONFIG_SERIAL_8250_RSA
static int serial8250_request_rsa_resource(struct uart_8250_port *up)
{
unsigned long start = UART_RSA_BASE << up->port.regshift;
@ -2831,14 +2832,17 @@ static void serial8250_release_rsa_resource(struct uart_8250_port *up)
break;
}
}
#endif
static void serial8250_release_port(struct uart_port *port)
{
struct uart_8250_port *up = up_to_u8250p(port);
serial8250_release_std_resource(up);
#ifdef CONFIG_SERIAL_8250_RSA
if (port->type == PORT_RSA)
serial8250_release_rsa_resource(up);
#endif
}
static int serial8250_request_port(struct uart_port *port)
@ -2850,11 +2854,13 @@ static int serial8250_request_port(struct uart_port *port)
return -ENODEV;
ret = serial8250_request_std_resource(up);
#ifdef CONFIG_SERIAL_8250_RSA
if (ret == 0 && port->type == PORT_RSA) {
ret = serial8250_request_rsa_resource(up);
if (ret < 0)
serial8250_release_std_resource(up);
}
#endif
return ret;
}
@ -3016,9 +3022,11 @@ static void serial8250_config_port(struct uart_port *port, int flags)
if (ret < 0)
return;
#ifdef CONFIG_SERIAL_8250_RSA
ret = serial8250_request_rsa_resource(up);
if (ret < 0)
probeflags &= ~PROBE_RSA;
#endif
if (port->iotype != up->cur_iotype)
set_io_from_upio(port);
@ -3037,8 +3045,10 @@ static void serial8250_config_port(struct uart_port *port, int flags)
if (port->type != PORT_UNKNOWN && flags & UART_CONFIG_IRQ)
autoconfig_irq(up);
#ifdef CONFIG_SERIAL_8250_RSA
if (port->type != PORT_RSA && probeflags & PROBE_RSA)
serial8250_release_rsa_resource(up);
#endif
if (port->type == PORT_UNKNOWN)
serial8250_release_std_resource(up);