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linux-sg2042
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isapnp driver semaphore to mutex 

Changed the isapnp semaphore to a mutex.

[akpm@linux-foundation.org: no externs-in-c]
[akpm@linux-foundation.org: build fix]
Signed-off-by: Daniel Walker <dwalker@mvista.com>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Daniel Walker 2008-02-06 01:40:04 -08:00 committed by Linus Torvalds
parent 2bb9a6b32f
commit b3bd86e2fd
3 changed files with 18 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/pnp/interface.c
View File

@ -10,9 +10,12 @@
#include <linux/errno.h>
#include <linux/list.h>
#include <linux/types.h>
#include <linux/pnp.h>
#include <linux/stat.h>
#include <linux/ctype.h>
#include <linux/slab.h>
#include <linux/mutex.h>
#include <asm/uaccess.h>
#include "base.h"
@ -315,8 +318,6 @@ static ssize_t pnp_show_current_resources(struct device *dmdev,
return ret;
}
extern struct semaphore pnp_res_mutex;
static ssize_t
pnp_set_current_resources(struct device *dmdev, struct device_attribute *attr,
const char *ubuf, size_t count)
@ -361,10 +362,10 @@ pnp_set_current_resources(struct device *dmdev, struct device_attribute *attr,
goto done;
}
if (!strnicmp(buf, "get", 3)) {
down(&pnp_res_mutex);
mutex_lock(&pnp_res_mutex);
if (pnp_can_read(dev))
dev->protocol->get(dev, &dev->res);
up(&pnp_res_mutex);
mutex_unlock(&pnp_res_mutex);
goto done;
}
if (!strnicmp(buf, "set", 3)) {
@ -373,7 +374,7 @@ pnp_set_current_resources(struct device *dmdev, struct device_attribute *attr,
goto done;
buf += 3;
pnp_init_resource_table(&dev->res);
down(&pnp_res_mutex);
mutex_lock(&pnp_res_mutex);
while (1) {
while (isspace(*buf))
++buf;
@ -455,7 +456,7 @@ pnp_set_current_resources(struct device *dmdev, struct device_attribute *attr,
}
break;
}
up(&pnp_res_mutex);
mutex_unlock(&pnp_res_mutex);
goto done;
}

19
drivers/pnp/manager.c
View File

@ -12,9 +12,10 @@
#include <linux/pnp.h>
#include <linux/slab.h>
#include <linux/bitmap.h>
#include <linux/mutex.h>
#include "base.h"
DECLARE_MUTEX(pnp_res_mutex);
DEFINE_MUTEX(pnp_res_mutex);
static int pnp_assign_port(struct pnp_dev *dev, struct pnp_port *rule, int idx)
{
@ -297,7 +298,7 @@ static int pnp_assign_resources(struct pnp_dev *dev, int depnum)
if (!pnp_can_configure(dev))
return -ENODEV;
down(&pnp_res_mutex);
mutex_lock(&pnp_res_mutex);
pnp_clean_resource_table(&dev->res); /* start with a fresh slate */
if (dev->independent) {
port = dev->independent->port;
@ -366,12 +367,12 @@ static int pnp_assign_resources(struct pnp_dev *dev, int depnum)
} else if (dev->dependent)
goto fail;
up(&pnp_res_mutex);
mutex_unlock(&pnp_res_mutex);
return 1;
fail:
pnp_clean_resource_table(&dev->res);
up(&pnp_res_mutex);
mutex_unlock(&pnp_res_mutex);
return 0;
}
@ -396,7 +397,7 @@ int pnp_manual_config_dev(struct pnp_dev *dev, struct pnp_resource_table *res,
return -ENOMEM;
*bak = dev->res;
down(&pnp_res_mutex);
mutex_lock(&pnp_res_mutex);
dev->res = *res;
if (!(mode & PNP_CONFIG_FORCE)) {
for (i = 0; i < PNP_MAX_PORT; i++) {
@ -416,14 +417,14 @@ int pnp_manual_config_dev(struct pnp_dev *dev, struct pnp_resource_table *res,
goto fail;
}
}
up(&pnp_res_mutex);
mutex_unlock(&pnp_res_mutex);
kfree(bak);
return 0;
fail:
dev->res = *bak;
up(&pnp_res_mutex);
mutex_unlock(&pnp_res_mutex);
kfree(bak);
return -EINVAL;
}
@ -547,9 +548,9 @@ int pnp_disable_dev(struct pnp_dev *dev)
dev->active = 0;
/* release the resources so that other devices can use them */
down(&pnp_res_mutex);
mutex_lock(&pnp_res_mutex);
pnp_clean_resource_table(&dev->res);
up(&pnp_res_mutex);
mutex_unlock(&pnp_res_mutex);
return 0;
}

1
include/linux/pnp.h
View File

@ -258,6 +258,7 @@ extern struct pnp_protocol isapnp_protocol;
#else
#define pnp_device_is_isapnp(dev) 0
#endif
extern struct mutex pnp_res_mutex;
#ifdef CONFIG_PNPBIOS
extern struct pnp_protocol pnpbios_protocol;