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Message-ID: <20070514091100.GG29206@traven>
Date: Mon, 14 May 2007 11:11:00 +0200
From: Matthias Kaehlcke <matthias.kaehlcke@...il.com>
To: Markus.Lidel@...dowconnect.com
Cc: linux-kernel@...r.kernel.org, akpm@...ux-foundation.org
Subject: [PATCH 1/5] 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@...il.com>
--
diff --git a/drivers/message/i2o/device.c b/drivers/message/i2o/device.c
index b9df143..80e35e8 100644
--- a/drivers/message/i2o/device.c
+++ b/drivers/message/i2o/device.c
@@ -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;
}
diff --git a/drivers/message/i2o/exec-osm.c b/drivers/message/i2o/exec-osm.c
index 5278aad..c13b932 100644
--- a/drivers/message/i2o/exec-osm.c
+++ b/drivers/message/i2o/exec-osm.c
@@ -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;
};
diff --git a/drivers/message/i2o/iop.c b/drivers/message/i2o/iop.c
index 3305c12..a1ec16a 100644
--- a/drivers/message/i2o/iop.c
+++ b/drivers/message/i2o/iop.c
@@ -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);
diff --git a/include/linux/i2o.h b/include/linux/i2o.h
index 52f53e2..333a370 100644
--- a/include/linux/i2o.h
+++ b/include/linux/i2o.h
@@ -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 */
--
Matthias Kaehlcke
Linux Application Developer
Barcelona
Dreams and reality are opposites. Action synthesizes them
(Assata Shakur)
.''`.
using free software / Debian GNU/Linux | http://debian.org : :' :
`. `'`
gpg --keyserver pgp.mit.edu --recv-keys 47D8E5D4 `-
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