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linux 2.6.16.38 w/ vs2.0.3-rc1
[linux-2.6.git]
/
drivers
/
sn
/
ioc4.c
diff --git
a/drivers/sn/ioc4.c
b/drivers/sn/ioc4.c
index
cdeff90
..
771e868
100644
(file)
--- a/
drivers/sn/ioc4.c
+++ b/
drivers/sn/ioc4.c
@@
-31,7
+31,7
@@
#include <linux/ioc4.h>
#include <linux/mmtimer.h>
#include <linux/rtc.h>
#include <linux/ioc4.h>
#include <linux/mmtimer.h>
#include <linux/rtc.h>
-#include <linux/
mutex
.h>
+#include <linux/
rwsem
.h>
#include <asm/sn/addrs.h>
#include <asm/sn/clksupport.h>
#include <asm/sn/shub_mmr.h>
#include <asm/sn/addrs.h>
#include <asm/sn/clksupport.h>
#include <asm/sn/shub_mmr.h>
@@
-54,10
+54,11
@@
* Submodule management *
************************/
* Submodule management *
************************/
-static DEFINE_MUTEX(ioc4_mutex);
-
static LIST_HEAD(ioc4_devices);
static LIST_HEAD(ioc4_devices);
+static DECLARE_RWSEM(ioc4_devices_rwsem);
+
static LIST_HEAD(ioc4_submodules);
static LIST_HEAD(ioc4_submodules);
+static DECLARE_RWSEM(ioc4_submodules_rwsem);
/* Register an IOC4 submodule */
int
/* Register an IOC4 submodule */
int
@@
-65,13
+66,15
@@
ioc4_register_submodule(struct ioc4_submodule *is)
{
struct ioc4_driver_data *idd;
{
struct ioc4_driver_data *idd;
-
mutex_lock(&ioc4_mutex
);
+
down_write(&ioc4_submodules_rwsem
);
list_add(&is->is_list, &ioc4_submodules);
list_add(&is->is_list, &ioc4_submodules);
+ up_write(&ioc4_submodules_rwsem);
/* Initialize submodule for each IOC4 */
if (!is->is_probe)
/* Initialize submodule for each IOC4 */
if (!is->is_probe)
-
goto out
;
+
return 0
;
+ down_read(&ioc4_devices_rwsem);
list_for_each_entry(idd, &ioc4_devices, idd_list) {
if (is->is_probe(idd)) {
printk(KERN_WARNING
list_for_each_entry(idd, &ioc4_devices, idd_list) {
if (is->is_probe(idd)) {
printk(KERN_WARNING
@@
-81,8
+84,8
@@
ioc4_register_submodule(struct ioc4_submodule *is)
pci_name(idd->idd_pdev));
}
}
pci_name(idd->idd_pdev));
}
}
- out:
- mutex_unlock(&ioc4_mutex);
+ up_read(&ioc4_devices_rwsem);
+
return 0;
}
return 0;
}
@@
-92,13
+95,15
@@
ioc4_unregister_submodule(struct ioc4_submodule *is)
{
struct ioc4_driver_data *idd;
{
struct ioc4_driver_data *idd;
-
mutex_lock(&ioc4_mutex
);
+
down_write(&ioc4_submodules_rwsem
);
list_del(&is->is_list);
list_del(&is->is_list);
+ up_write(&ioc4_submodules_rwsem);
/* Remove submodule for each IOC4 */
if (!is->is_remove)
/* Remove submodule for each IOC4 */
if (!is->is_remove)
-
goto out
;
+
return
;
+ down_read(&ioc4_devices_rwsem);
list_for_each_entry(idd, &ioc4_devices, idd_list) {
if (is->is_remove(idd)) {
printk(KERN_WARNING
list_for_each_entry(idd, &ioc4_devices, idd_list) {
if (is->is_remove(idd)) {
printk(KERN_WARNING
@@
-108,8
+113,7
@@
ioc4_unregister_submodule(struct ioc4_submodule *is)
pci_name(idd->idd_pdev));
}
}
pci_name(idd->idd_pdev));
}
}
- out:
- mutex_unlock(&ioc4_mutex);
+ up_read(&ioc4_devices_rwsem);
}
/*********************
}
/*********************
@@
-308,11
+312,12
@@
ioc4_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
/* Track PCI-device specific data */
idd->idd_serial_data = NULL;
pci_set_drvdata(idd->idd_pdev, idd);
/* Track PCI-device specific data */
idd->idd_serial_data = NULL;
pci_set_drvdata(idd->idd_pdev, idd);
-
- mutex_lock(&ioc4_mutex);
+ down_write(&ioc4_devices_rwsem);
list_add_tail(&idd->idd_list, &ioc4_devices);
list_add_tail(&idd->idd_list, &ioc4_devices);
+ up_write(&ioc4_devices_rwsem);
/* Add this IOC4 to all submodules */
/* Add this IOC4 to all submodules */
+ down_read(&ioc4_submodules_rwsem);
list_for_each_entry(is, &ioc4_submodules, is_list) {
if (is->is_probe && is->is_probe(idd)) {
printk(KERN_WARNING
list_for_each_entry(is, &ioc4_submodules, is_list) {
if (is->is_probe && is->is_probe(idd)) {
printk(KERN_WARNING
@@
-322,7
+327,7
@@
ioc4_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
pci_name(idd->idd_pdev));
}
}
pci_name(idd->idd_pdev));
}
}
-
mutex_unlock(&ioc4_mutex
);
+
up_read(&ioc4_submodules_rwsem
);
return 0;
return 0;
@@
-346,7
+351,7
@@
ioc4_remove(struct pci_dev *pdev)
idd = pci_get_drvdata(pdev);
/* Remove this IOC4 from all submodules */
idd = pci_get_drvdata(pdev);
/* Remove this IOC4 from all submodules */
-
mutex_lock(&ioc4_mutex
);
+
down_read(&ioc4_submodules_rwsem
);
list_for_each_entry(is, &ioc4_submodules, is_list) {
if (is->is_remove && is->is_remove(idd)) {
printk(KERN_WARNING
list_for_each_entry(is, &ioc4_submodules, is_list) {
if (is->is_remove && is->is_remove(idd)) {
printk(KERN_WARNING
@@
-356,7
+361,7
@@
ioc4_remove(struct pci_dev *pdev)
pci_name(idd->idd_pdev));
}
}
pci_name(idd->idd_pdev));
}
}
-
mutex_unlock(&ioc4_mutex
);
+
up_read(&ioc4_submodules_rwsem
);
/* Release resources */
iounmap(idd->idd_misc_regs);
/* Release resources */
iounmap(idd->idd_misc_regs);
@@
-372,9
+377,9
@@
ioc4_remove(struct pci_dev *pdev)
pci_disable_device(pdev);
/* Remove and free driver data */
pci_disable_device(pdev);
/* Remove and free driver data */
-
mutex_lock(&ioc4_mutex
);
+
down_write(&ioc4_devices_rwsem
);
list_del(&idd->idd_list);
list_del(&idd->idd_list);
-
mutex_unlock(&ioc4_mutex
);
+
up_write(&ioc4_devices_rwsem
);
kfree(idd);
}
kfree(idd);
}