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[SERIAL] turn serial semaphores into mutexes

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Turn several drivers/serial/ semaphores-used-as-mutex into mutexes

Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Arjan van de Ven
2006-01-12 18:44:32 +00:00
committed by Russell King
parent 593195f9b2
commit f392ecfa12
5 changed files with 36 additions and 35 deletions
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23
drivers/serial/pmac_zilog.c
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@@ -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