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Use mutexes instead of semaphores in I2O driver 

The I2O driver uses two semaphores as mutexes.  Use the mutex API instead of
the (binary) semaphores.

Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Matthias Kaehlcke 2007-07-15 23:39:49 -07:00 committed by Linus Torvalds
parent 1c6b4aa945
commit 9ac162521c
4 changed files with 14 additions and 13 deletions
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16
drivers/message/i2o/device.c
View File

@ -62,7 +62,7 @@ int i2o_device_claim(struct i2o_device *dev)
{
int rc = 0;
down(&dev->lock);
mutex_lock(&dev->lock);
rc = i2o_device_issue_claim(dev, I2O_CMD_UTIL_CLAIM, I2O_CLAIM_PRIMARY);
if (!rc)
@ -72,7 +72,7 @@ int i2o_device_claim(struct i2o_device *dev)
pr_debug("i2o: claim of device %d failed %d\n",
dev->lct_data.tid, rc);
up(&dev->lock);
mutex_unlock(&dev->lock);
return rc;
}
@ -96,7 +96,7 @@ int i2o_device_claim_release(struct i2o_device *dev)
int tries;
int rc = 0;
down(&dev->lock);
mutex_lock(&dev->lock);
/*
* If the controller takes a nonblocking approach to
@ -118,7 +118,7 @@ int i2o_device_claim_release(struct i2o_device *dev)
pr_debug("i2o: claim release of device %d failed %d\n",
dev->lct_data.tid, rc);
up(&dev->lock);
mutex_unlock(&dev->lock);
return rc;
}
@ -198,7 +198,7 @@ static struct i2o_device *i2o_device_alloc(void)
return ERR_PTR(-ENOMEM);
INIT_LIST_HEAD(&dev->list);
init_MUTEX(&dev->lock);
mutex_init(&dev->lock);
dev->device.bus = &i2o_bus_type;
dev->device.release = &i2o_device_release;
@ -326,7 +326,7 @@ int i2o_device_parse_lct(struct i2o_controller *c)
u16 table_size;
u32 buf;
down(&c->lct_lock);
mutex_lock(&c->lct_lock);
kfree(c->lct);
@ -335,7 +335,7 @@ int i2o_device_parse_lct(struct i2o_controller *c)
lct = c->lct = kmalloc(table_size * 4, GFP_KERNEL);
if (!lct) {
up(&c->lct_lock);
mutex_unlock(&c->lct_lock);
return -ENOMEM;
}
@ -408,7 +408,7 @@ int i2o_device_parse_lct(struct i2o_controller *c)
i2o_device_remove(dev);
}
up(&c->lct_lock);
mutex_unlock(&c->lct_lock);
return 0;
}

4
drivers/message/i2o/exec-osm.c
View File

@ -537,7 +537,7 @@ static int i2o_exec_lct_notify(struct i2o_controller *c, u32 change_ind)
struct device *dev;
struct i2o_message *msg;
down(&c->lct_lock);
mutex_lock(&c->lct_lock);
dev = &c->pdev->dev;
@ -561,7 +561,7 @@ static int i2o_exec_lct_notify(struct i2o_controller *c, u32 change_ind)
i2o_msg_post(c, msg);
up(&c->lct_lock);
mutex_unlock(&c->lct_lock);
return 0;
};

2
drivers/message/i2o/iop.c
View File

@ -1067,7 +1067,7 @@ struct i2o_controller *i2o_iop_alloc(void)
INIT_LIST_HEAD(&c->devices);
spin_lock_init(&c->lock);
init_MUTEX(&c->lct_lock);
mutex_init(&c->lct_lock);
device_initialize(&c->device);

5
include/linux/i2o.h
View File

@ -31,6 +31,7 @@
#include <linux/slab.h>
#include <linux/workqueue.h> /* work_struct */
#include <linux/mempool.h>
#include <linux/mutex.h>
#include <asm/io.h>
#include <asm/semaphore.h> /* Needed for MUTEX init macros */
@ -425,7 +426,7 @@ struct i2o_device {
struct device device;
struct semaphore lock; /* device lock */
struct mutex lock; /* device lock */
};
/*
@ -544,7 +545,7 @@ struct i2o_controller {
struct i2o_dma hrt; /* HW Resource Table */
i2o_lct *lct; /* Logical Config Table */
struct i2o_dma dlct; /* Temp LCT */
struct semaphore lct_lock; /* Lock for LCT updates */
struct mutex lct_lock; /* Lock for LCT updates */
struct i2o_dma status_block; /* IOP status block */
struct i2o_io base; /* controller messaging unit */