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Driver Core: Make PM operations a const pointer
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They are not supposed to be modified by drivers, so make them const.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
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Dmitry Torokhov committed Jul 25, 2009
1 parent 11a7926 commit 8150f32
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Showing 4 changed files with 19 additions and 16 deletions.
2 changes: 1 addition & 1 deletion drivers/base/platform.c
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Original file line number Diff line number Diff line change
Expand Up @@ -925,7 +925,7 @@ static int platform_pm_restore_noirq(struct device *dev)

#endif /* !CONFIG_HIBERNATION */

static struct dev_pm_ops platform_dev_pm_ops = {
static const struct dev_pm_ops platform_dev_pm_ops = {
.prepare = platform_pm_prepare,
.complete = platform_pm_complete,
.suspend = platform_pm_suspend,
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8 changes: 5 additions & 3 deletions drivers/base/power/main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -157,8 +157,9 @@ void device_pm_move_last(struct device *dev)
* @ops: PM operations to choose from.
* @state: PM transition of the system being carried out.
*/
static int pm_op(struct device *dev, struct dev_pm_ops *ops,
pm_message_t state)
static int pm_op(struct device *dev,
const struct dev_pm_ops *ops,
pm_message_t state)
{
int error = 0;

Expand Down Expand Up @@ -220,7 +221,8 @@ static int pm_op(struct device *dev, struct dev_pm_ops *ops,
* The operation is executed with interrupts disabled by the only remaining
* functional CPU in the system.
*/
static int pm_noirq_op(struct device *dev, struct dev_pm_ops *ops,
static int pm_noirq_op(struct device *dev,
const struct dev_pm_ops *ops,
pm_message_t state)
{
int error = 0;
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16 changes: 8 additions & 8 deletions drivers/pci/pci-driver.c
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Original file line number Diff line number Diff line change
Expand Up @@ -575,7 +575,7 @@ static void pci_pm_complete(struct device *dev)
static int pci_pm_suspend(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;

if (pci_has_legacy_pm_support(pci_dev))
return pci_legacy_suspend(dev, PMSG_SUSPEND);
Expand Down Expand Up @@ -613,7 +613,7 @@ static int pci_pm_suspend(struct device *dev)
static int pci_pm_suspend_noirq(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;

if (pci_has_legacy_pm_support(pci_dev))
return pci_legacy_suspend_late(dev, PMSG_SUSPEND);
Expand Down Expand Up @@ -672,7 +672,7 @@ static int pci_pm_resume_noirq(struct device *dev)
static int pci_pm_resume(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
int error = 0;

/*
Expand Down Expand Up @@ -711,7 +711,7 @@ static int pci_pm_resume(struct device *dev)
static int pci_pm_freeze(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;

if (pci_has_legacy_pm_support(pci_dev))
return pci_legacy_suspend(dev, PMSG_FREEZE);
Expand Down Expand Up @@ -780,7 +780,7 @@ static int pci_pm_thaw_noirq(struct device *dev)
static int pci_pm_thaw(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
int error = 0;

if (pci_has_legacy_pm_support(pci_dev))
Expand All @@ -799,7 +799,7 @@ static int pci_pm_thaw(struct device *dev)
static int pci_pm_poweroff(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;

if (pci_has_legacy_pm_support(pci_dev))
return pci_legacy_suspend(dev, PMSG_HIBERNATE);
Expand Down Expand Up @@ -872,7 +872,7 @@ static int pci_pm_restore_noirq(struct device *dev)
static int pci_pm_restore(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
int error = 0;

/*
Expand Down Expand Up @@ -910,7 +910,7 @@ static int pci_pm_restore(struct device *dev)

#endif /* !CONFIG_HIBERNATION */

struct dev_pm_ops pci_dev_pm_ops = {
const struct dev_pm_ops pci_dev_pm_ops = {
.prepare = pci_pm_prepare,
.complete = pci_pm_complete,
.suspend = pci_pm_suspend,
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9 changes: 5 additions & 4 deletions include/linux/device.h
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Original file line number Diff line number Diff line change
Expand Up @@ -62,7 +62,7 @@ struct bus_type {
int (*suspend)(struct device *dev, pm_message_t state);
int (*resume)(struct device *dev);

struct dev_pm_ops *pm;
const struct dev_pm_ops *pm;

struct bus_type_private *p;
};
Expand Down Expand Up @@ -132,7 +132,7 @@ struct device_driver {
int (*resume) (struct device *dev);
struct attribute_group **groups;

struct dev_pm_ops *pm;
const struct dev_pm_ops *pm;

struct driver_private *p;
};
Expand Down Expand Up @@ -200,7 +200,8 @@ struct class {
int (*suspend)(struct device *dev, pm_message_t state);
int (*resume)(struct device *dev);

struct dev_pm_ops *pm;
const struct dev_pm_ops *pm;

struct class_private *p;
};

Expand Down Expand Up @@ -291,7 +292,7 @@ struct device_type {
char *(*nodename)(struct device *dev);
void (*release)(struct device *dev);

struct dev_pm_ops *pm;
const struct dev_pm_ops *pm;
};

/* interface for exporting device attributes */
Expand Down

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