Merge tag 'tty-3.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial driver fixes from Greg Kroah-Hartman:
"Here are some small bugfixes, and one revert, of serial driver issues
that have been reported"
* tag 'tty-3.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
Revert "serial: 8250: Make SERIAL_8250_RUNTIME_UARTS work correctly"
serial: samsung: enable clock before clearing pending interrupts during init
serial/imx: disable hardware flow control at startup
diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c
index 46528d5..86c00b1 100644
--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -2755,7 +2755,7 @@
if (nr_uarts > UART_NR)
nr_uarts = UART_NR;
- for (i = 0; i < UART_NR; i++) {
+ for (i = 0; i < nr_uarts; i++) {
struct uart_8250_port *up = &serial8250_ports[i];
struct uart_port *port = &up->port;
@@ -2916,7 +2916,7 @@
* if so, search for the first available port that does have
* console support.
*/
- if (co->index >= UART_NR)
+ if (co->index >= nr_uarts)
co->index = 0;
port = &serial8250_ports[co->index].port;
if (!port->iobase && !port->membase)
@@ -2957,7 +2957,7 @@
int line;
struct uart_port *port;
- for (line = 0; line < UART_NR; line++) {
+ for (line = 0; line < nr_uarts; line++) {
port = &serial8250_ports[line].port;
if (uart_match_port(p, port))
return line;
@@ -3110,7 +3110,7 @@
{
int i;
- for (i = 0; i < UART_NR; i++) {
+ for (i = 0; i < nr_uarts; i++) {
struct uart_8250_port *up = &serial8250_ports[i];
if (up->port.dev == &dev->dev)
@@ -3178,7 +3178,7 @@
/*
* First, find a port entry which matches.
*/
- for (i = 0; i < UART_NR; i++)
+ for (i = 0; i < nr_uarts; i++)
if (uart_match_port(&serial8250_ports[i].port, port))
return &serial8250_ports[i];
@@ -3187,7 +3187,7 @@
* free entry. We look for one which hasn't been previously
* used (indicated by zero iobase).
*/
- for (i = 0; i < UART_NR; i++)
+ for (i = 0; i < nr_uarts; i++)
if (serial8250_ports[i].port.type == PORT_UNKNOWN &&
serial8250_ports[i].port.iobase == 0)
return &serial8250_ports[i];
@@ -3196,7 +3196,7 @@
* That also failed. Last resort is to find any entry which
* doesn't have a real port associated with it.
*/
- for (i = 0; i < UART_NR; i++)
+ for (i = 0; i < nr_uarts; i++)
if (serial8250_ports[i].port.type == PORT_UNKNOWN)
return &serial8250_ports[i];
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 147c9e1..8cdfbd3 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -761,6 +761,8 @@
temp = readl(sport->port.membase + UCR2);
temp |= (UCR2_RXEN | UCR2_TXEN);
+ if (!sport->have_rtscts)
+ temp |= UCR2_IRTS;
writel(temp, sport->port.membase + UCR2);
if (USE_IRDA(sport)) {
diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c
index 8942941..0c8a9fa 100644
--- a/drivers/tty/serial/samsung.c
+++ b/drivers/tty/serial/samsung.c
@@ -1166,6 +1166,18 @@
ourport->tx_irq = ret;
ourport->clk = clk_get(&platdev->dev, "uart");
+ if (IS_ERR(ourport->clk)) {
+ pr_err("%s: Controller clock not found\n",
+ dev_name(&platdev->dev));
+ return PTR_ERR(ourport->clk);
+ }
+
+ ret = clk_prepare_enable(ourport->clk);
+ if (ret) {
+ pr_err("uart: clock failed to prepare+enable: %d\n", ret);
+ clk_put(ourport->clk);
+ return ret;
+ }
/* Keep all interrupts masked and cleared */
if (s3c24xx_serial_has_interrupt_mask(port)) {
@@ -1180,6 +1192,7 @@
/* reset the fifos (and setup the uart) */
s3c24xx_serial_resetport(port, cfg);
+ clk_disable_unprepare(ourport->clk);
return 0;
}
