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[PATCH] USB: convert a bunch of USB semaphores to mutexes

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the patch below converts a bunch of semaphores-used-as-mutex in the USB
code to mutexes

Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Arjan van de Ven
2006-01-11 15:55:29 +01:00
committed by Greg Kroah-Hartman
parent 35cce732d9
commit 4186ecf8ad
34 changed files with 389 additions and 372 deletions
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21
drivers/usb/mon/mon_text.c
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@@ -8,6 +8,7 @@
#include <linux/list.h>
#include <linux/usb.h>
#include <linux/time.h>
#include <linux/mutex.h>
#include <asm/uaccess.h>
#include "usb_mon.h"
@@ -54,7 +55,7 @@ struct mon_reader_text {
wait_queue_head_t wait;
int printf_size;
char *printf_buf;
struct semaphore printf_lock;
struct mutex printf_lock;
char slab_name[SLAB_NAME_SZ];
};
@@ -208,7 +209,7 @@ static int mon_text_open(struct inode *inode, struct file *file)
struct mon_reader_text *rp;
int rc;
down(&mon_lock);
mutex_lock(&mon_lock);
mbus = inode->u.generic_ip;
ubus = mbus->u_bus;
@@ -220,7 +221,7 @@ static int mon_text_open(struct inode *inode, struct file *file)
memset(rp, 0, sizeof(struct mon_reader_text));
INIT_LIST_HEAD(&rp->e_list);
init_waitqueue_head(&rp->wait);
init_MUTEX(&rp->printf_lock);
mutex_init(&rp->printf_lock);
rp->printf_size = PRINTF_DFL;
rp->printf_buf = kmalloc(rp->printf_size, GFP_KERNEL);
@@ -247,7 +248,7 @@ static int mon_text_open(struct inode *inode, struct file *file)
mon_reader_add(mbus, &rp->r);
file->private_data = rp;
up(&mon_lock);
mutex_unlock(&mon_lock);
return 0;
// err_busy:
@@ -257,7 +258,7 @@ err_slab:
err_alloc_pr:
kfree(rp);
err_alloc:
up(&mon_lock);
mutex_unlock(&mon_lock);
return rc;
}
@@ -301,7 +302,7 @@ static ssize_t mon_text_read(struct file *file, char __user *buf,
set_current_state(TASK_RUNNING);
remove_wait_queue(&rp->wait, &waita);
down(&rp->printf_lock);
mutex_lock(&rp->printf_lock);
cnt = 0;
pbuf = rp->printf_buf;
limit = rp->printf_size;
@@ -358,7 +359,7 @@ static ssize_t mon_text_read(struct file *file, char __user *buf,
if (copy_to_user(buf, rp->printf_buf, cnt))
cnt = -EFAULT;
up(&rp->printf_lock);
mutex_unlock(&rp->printf_lock);
kmem_cache_free(rp->e_slab, ep);
return cnt;
}
@@ -371,12 +372,12 @@ static int mon_text_release(struct inode *inode, struct file *file)
struct list_head *p;
struct mon_event_text *ep;
down(&mon_lock);
mutex_lock(&mon_lock);
mbus = inode->u.generic_ip;
if (mbus->nreaders <= 0) {
printk(KERN_ERR TAG ": consistency error on close\n");
up(&mon_lock);
mutex_unlock(&mon_lock);
return 0;
}
mon_reader_del(mbus, &rp->r);
@@ -402,7 +403,7 @@ static int mon_text_release(struct inode *inode, struct file *file)
kfree(rp->printf_buf);
kfree(rp);
up(&mon_lock);
mutex_unlock(&mon_lock);
return 0;
}