Commit f392ecfa authored by Arjan van de Ven's avatar Arjan van de Ven Committed by Russell King

[SERIAL] turn serial semaphores into mutexes

Turn several drivers/serial/ semaphores-used-as-mutex into mutexes
Signed-off-by: default avatarArjan van de Ven <arjan@infradead.org>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 593195f9
......@@ -41,6 +41,7 @@
#include <linux/serial.h>
#include <linux/serial_8250.h>
#include <linux/nmi.h>
#include <linux/mutex.h>
#include <asm/io.h>
#include <asm/irq.h>
......@@ -2467,7 +2468,7 @@ static struct platform_device *serial8250_isa_devs;
* 16x50 serial ports to be configured at run-time, to support PCMCIA
* modems and PCI multiport cards.
*/
static DECLARE_MUTEX(serial_sem);
static DEFINE_MUTEX(serial_mutex);
static struct uart_8250_port *serial8250_find_match_or_unused(struct uart_port *port)
{
......@@ -2522,7 +2523,7 @@ int serial8250_register_port(struct uart_port *port)
if (port->uartclk == 0)
return -EINVAL;
down(&serial_sem);
mutex_lock(&serial_mutex);
uart = serial8250_find_match_or_unused(port);
if (uart) {
......@@ -2544,7 +2545,7 @@ int serial8250_register_port(struct uart_port *port)
if (ret == 0)
ret = uart->port.line;
}
up(&serial_sem);
mutex_unlock(&serial_mutex);
return ret;
}
......@@ -2561,7 +2562,7 @@ void serial8250_unregister_port(int line)
{
struct uart_8250_port *uart = &serial8250_ports[line];
down(&serial_sem);
mutex_lock(&serial_mutex);
uart_remove_one_port(&serial8250_reg, &uart->port);
if (serial8250_isa_devs) {
uart->port.flags &= ~UPF_BOOT_AUTOCONF;
......@@ -2571,7 +2572,7 @@ void serial8250_unregister_port(int line)
} else {
uart->port.dev = NULL;
}
up(&serial_sem);
mutex_unlock(&serial_mutex);
}
EXPORT_SYMBOL(serial8250_unregister_port);
......
......@@ -442,6 +442,7 @@ static char *serial_version = "$Revision: 1.25 $";
#include <linux/init.h>
#include <asm/uaccess.h>
#include <linux/kernel.h>
#include <linux/mutex.h>
#include <asm/io.h>
#include <asm/irq.h>
......@@ -1315,11 +1316,7 @@ static const struct control_pins e100_modem_pins[NR_PORTS] =
* memory if large numbers of serial ports are open.
*/
static unsigned char *tmp_buf;
#ifdef DECLARE_MUTEX
static DECLARE_MUTEX(tmp_buf_sem);
#else
static struct semaphore tmp_buf_sem = MUTEX;
#endif
static DEFINE_MUTEX(tmp_buf_mutex);
/* Calculate the chartime depending on baudrate, numbor of bits etc. */
static void update_char_time(struct e100_serial * info)
......@@ -3661,7 +3658,7 @@ rs_raw_write(struct tty_struct * tty, int from_user,
* design.
*/
if (from_user) {
down(&tmp_buf_sem);
mutex_lock(&tmp_buf_mutex);
while (1) {
int c1;
c = CIRC_SPACE_TO_END(info->xmit.head,
......@@ -3692,7 +3689,7 @@ rs_raw_write(struct tty_struct * tty, int from_user,
count -= c;
ret += c;
}
up(&tmp_buf_sem);
mutex_unlock(&tmp_buf_mutex);
} else {
cli();
while (count) {
......
......@@ -60,6 +60,7 @@
#include <linux/pmu.h>
#include <linux/bitops.h>
#include <linux/sysrq.h>
#include <linux/mutex.h>
#include <asm/sections.h>
#include <asm/io.h>
#include <asm/irq.h>
......@@ -96,7 +97,7 @@ MODULE_LICENSE("GPL");
*/
static struct uart_pmac_port pmz_ports[MAX_ZS_PORTS];
static int pmz_ports_count;
static DECLARE_MUTEX(pmz_irq_sem);
static DEFINE_MUTEX(pmz_irq_mutex);
static struct uart_driver pmz_uart_reg = {
.owner = THIS_MODULE,
......@@ -922,7 +923,7 @@ static int pmz_startup(struct uart_port *port)
if (uap->node == NULL)
return -ENODEV;
down(&pmz_irq_sem);
mutex_lock(&pmz_irq_mutex);
uap->flags |= PMACZILOG_FLAG_IS_OPEN;
......@@ -940,11 +941,11 @@ static int pmz_startup(struct uart_port *port)
dev_err(&uap->dev->ofdev.dev,
"Unable to register zs interrupt handler.\n");
pmz_set_scc_power(uap, 0);
up(&pmz_irq_sem);
mutex_unlock(&pmz_irq_mutex);
return -ENXIO;
}
up(&pmz_irq_sem);
mutex_unlock(&pmz_irq_mutex);
/* Right now, we deal with delay by blocking here, I'll be
* smarter later on
......@@ -981,7 +982,7 @@ static void pmz_shutdown(struct uart_port *port)
if (uap->node == NULL)
return;
down(&pmz_irq_sem);
mutex_lock(&pmz_irq_mutex);
/* Release interrupt handler */
free_irq(uap->port.irq, uap);
......@@ -1002,7 +1003,7 @@ static void pmz_shutdown(struct uart_port *port)
if (ZS_IS_CONS(uap) || ZS_IS_ASLEEP(uap)) {
spin_unlock_irqrestore(&port->lock, flags);
up(&pmz_irq_sem);
mutex_unlock(&pmz_irq_mutex);
return;
}
......@@ -1019,7 +1020,7 @@ static void pmz_shutdown(struct uart_port *port)
spin_unlock_irqrestore(&port->lock, flags);
up(&pmz_irq_sem);
mutex_unlock(&pmz_irq_mutex);
pmz_debug("pmz: shutdown() done.\n");
}
......@@ -1591,7 +1592,7 @@ static int pmz_suspend(struct macio_dev *mdev, pm_message_t pm_state)
state = pmz_uart_reg.state + uap->port.line;
down(&pmz_irq_sem);
mutex_lock(&pmz_irq_mutex);
down(&state->sem);
spin_lock_irqsave(&uap->port.lock, flags);
......@@ -1624,7 +1625,7 @@ static int pmz_suspend(struct macio_dev *mdev, pm_message_t pm_state)
pmz_set_scc_power(uap, 0);
up(&state->sem);
up(&pmz_irq_sem);
mutex_unlock(&pmz_irq_mutex);
pmz_debug("suspend, switching complete\n");
......@@ -1651,7 +1652,7 @@ static int pmz_resume(struct macio_dev *mdev)
state = pmz_uart_reg.state + uap->port.line;
down(&pmz_irq_sem);
mutex_lock(&pmz_irq_mutex);
down(&state->sem);
spin_lock_irqsave(&uap->port.lock, flags);
......@@ -1685,7 +1686,7 @@ static int pmz_resume(struct macio_dev *mdev)
bail:
up(&state->sem);
up(&pmz_irq_sem);
mutex_unlock(&pmz_irq_mutex);
/* Right now, we deal with delay by blocking here, I'll be
* smarter later on
......
......@@ -33,6 +33,7 @@
#include <linux/device.h>
#include <linux/serial.h> /* for serial_state and serial_icounter_struct */
#include <linux/delay.h>
#include <linux/mutex.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
......@@ -47,7 +48,7 @@
/*
* This is used to lock changes in serial line configuration.
*/
static DECLARE_MUTEX(port_sem);
static DEFINE_MUTEX(port_mutex);
#define HIGH_BITS_OFFSET ((sizeof(long)-sizeof(int))*8)
......@@ -1472,7 +1473,7 @@ static struct uart_state *uart_get(struct uart_driver *drv, int line)
{
struct uart_state *state;
down(&port_sem);
mutex_lock(&port_mutex);
state = drv->state + line;
if (down_interruptible(&state->sem)) {
state = ERR_PTR(-ERESTARTSYS);
......@@ -1509,7 +1510,7 @@ static struct uart_state *uart_get(struct uart_driver *drv, int line)
}
out:
up(&port_sem);
mutex_unlock(&port_mutex);
return state;
}
......@@ -2219,7 +2220,7 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *port)
state = drv->state + port->line;
down(&port_sem);
mutex_lock(&port_mutex);
if (state->port) {
ret = -EINVAL;
goto out;
......@@ -2255,7 +2256,7 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *port)
register_console(port->cons);
out:
up(&port_sem);
mutex_unlock(&port_mutex);
return ret;
}
......@@ -2279,7 +2280,7 @@ int uart_remove_one_port(struct uart_driver *drv, struct uart_port *port)
printk(KERN_ALERT "Removing wrong port: %p != %p\n",
state->port, port);
down(&port_sem);
mutex_lock(&port_mutex);
/*
* Remove the devices from devfs
......@@ -2288,7 +2289,7 @@ int uart_remove_one_port(struct uart_driver *drv, struct uart_port *port)
uart_unconfigure_port(drv, state);
state->port = NULL;
up(&port_sem);
mutex_unlock(&port_mutex);
return 0;
}
......
......@@ -52,6 +52,7 @@
#include <linux/tty_flip.h>
#include <linux/serial_core.h>
#include <linux/serial.h>
#include <linux/mutex.h>
#include <asm/io.h>
#include <asm/irq.h>
......@@ -1018,7 +1019,7 @@ static void serial_txx9_resume_port(int line)
uart_resume_port(&serial_txx9_reg, &serial_txx9_ports[line].port);
}
static DECLARE_MUTEX(serial_txx9_sem);
static DEFINE_MUTEX(serial_txx9_mutex);
/**
* serial_txx9_register_port - register a serial port
......@@ -1037,7 +1038,7 @@ static int __devinit serial_txx9_register_port(struct uart_port *port)
struct uart_txx9_port *uart;
int ret = -ENOSPC;
down(&serial_txx9_sem);
mutex_lock(&serial_txx9_mutex);
for (i = 0; i < UART_NR; i++) {
uart = &serial_txx9_ports[i];
if (uart->port.type == PORT_UNKNOWN)
......@@ -1058,7 +1059,7 @@ static int __devinit serial_txx9_register_port(struct uart_port *port)
if (ret == 0)
ret = uart->port.line;
}
up(&serial_txx9_sem);
mutex_unlock(&serial_txx9_mutex);
return ret;
}
......@@ -1073,7 +1074,7 @@ static void __devexit serial_txx9_unregister_port(int line)
{
struct uart_txx9_port *uart = &serial_txx9_ports[line];
down(&serial_txx9_sem);
mutex_lock(&serial_txx9_mutex);
uart_remove_one_port(&serial_txx9_reg, &uart->port);
uart->port.flags = 0;
uart->port.type = PORT_UNKNOWN;
......@@ -1082,7 +1083,7 @@ static void __devexit serial_txx9_unregister_port(int line)
uart->port.membase = 0;
uart->port.dev = NULL;
uart_add_one_port(&serial_txx9_reg, &uart->port);
up(&serial_txx9_sem);
mutex_unlock(&serial_txx9_mutex);
}
/*
......
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