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Commit 94c8b6db authored by Paul Mundt's avatar Paul Mundt
Browse files

serial: sh-sci: Bring oversized error handlers out of line. 



Presently much of the error handling paths are inlined, stemming from a
time when they were much smaller. This simply brings them out of line and
leaves it up to the compiler. Given that some of these now contain nested
loops, it's pretty hard to justify the inlining regardless of the
footprint.

Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent e2651647

drivers/serial/sh-sci.c

+10 −13
Original line number Diff line number Diff line
@@ -125,12 +125,6 @@ to_sci_port(struct uart_port *uart) 
#if defined(CONFIG_CONSOLE_POLL) || defined(CONFIG_SERIAL_SH_SCI_CONSOLE)



#ifdef CONFIG_CONSOLE_POLL

static inline void handle_error(struct uart_port *port)

{

	/* Clear error flags */

	sci_out(port, SCxSR, SCxSR_ERROR_CLEAR(port));

}



static int sci_poll_get_char(struct uart_port *port)

{

	unsigned short status;
@@ -139,7 +133,7 @@ static int sci_poll_get_char(struct uart_port *port) 
	do {

		status = sci_in(port, SCxSR);

		if (status & SCxSR_ERRORS(port)) {

			handle_error(port);

			sci_out(port, SCxSR, SCxSR_ERROR_CLEAR(port));

			continue;

		}

		break;
@@ -458,7 +452,7 @@ static void sci_transmit_chars(struct uart_port *port) 
/* On SH3, SCIF may read end-of-break as a space->mark char */

#define STEPFN(c)  ({int __c = (c); (((__c-1)|(__c)) == -1); })



static inline void sci_receive_chars(struct uart_port *port)

static void sci_receive_chars(struct uart_port *port)

{

	struct sci_port *sci_port = to_sci_port(port);

	struct tty_struct *tty = port->state->port.tty;
@@ -549,18 +543,21 @@ static inline void sci_receive_chars(struct uart_port *port) 
}



#define SCI_BREAK_JIFFIES (HZ/20)

/* The sci generates interrupts during the break,



/*

 * The sci generates interrupts during the break,

 * 1 per millisecond or so during the break period, for 9600 baud.

 * So dont bother disabling interrupts.

 * But dont want more than 1 break event.

 * Use a kernel timer to periodically poll the rx line until

 * the break is finished.

 */

static void sci_schedule_break_timer(struct sci_port *port)

static inline void sci_schedule_break_timer(struct sci_port *port)

{

	port->break_timer.expires = jiffies + SCI_BREAK_JIFFIES;

	add_timer(&port->break_timer);

}



/* Ensure that two consecutive samples find the break over. */

static void sci_break_timer(unsigned long data)

{
@@ -577,7 +574,7 @@ static void sci_break_timer(unsigned long data) 
		port->break_flag = 0;

}



static inline int sci_handle_errors(struct uart_port *port)

static int sci_handle_errors(struct uart_port *port)

{

	int copied = 0;

	unsigned short status = sci_in(port, SCxSR);
@@ -633,7 +630,7 @@ static inline int sci_handle_errors(struct uart_port *port) 
	return copied;

}



static inline int sci_handle_fifo_overrun(struct uart_port *port)

static int sci_handle_fifo_overrun(struct uart_port *port)

{

	struct tty_struct *tty = port->state->port.tty;

	int copied = 0;
@@ -654,7 +651,7 @@ static inline int sci_handle_fifo_overrun(struct uart_port *port) 
	return copied;

}



static inline int sci_handle_breaks(struct uart_port *port)

static int sci_handle_breaks(struct uart_port *port)

{

	int copied = 0;

	unsigned short status = sci_in(port, SCxSR);