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Date: Tue, 30 Dec 2008 23:43:06 +0100
From: "Rafael J. Wysocki" <rjw@...k.pl>
To: Len Brown <lenb@...nel.org>
Cc: Jesse Barnes <jbarnes@...tuousgeek.org>,
Pavel Machek <pavel@...e.cz>,
pm list <linux-pm@...ts.linux-foundation.org>,
Matthew Wilcox <matthew@....cx>,
"H. Peter Anvin" <hpa@...or.com>,
LKML <linux-kernel@...r.kernel.org>, Greg KH <greg@...ah.com>,
Linux PCI <linux-pci@...r.kernel.org>
Subject: [RFC][PATCH 6/10] PCI PM: Rearrange code in pci-driver.c
Rename two functions and rearrange code in drivers/pci/pci-driver.c
so that it's easier to follow. In particular, separate invocations
of the legacy callbacks from the rest of the new callbacks' code.
No functional changes should result from this.
Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
---
drivers/pci/pci-driver.c | 104 +++++++++++++++++++++++++++++------------------
1 file changed, 65 insertions(+), 39 deletions(-)
Index: linux-2.6/drivers/pci/pci-driver.c
===================================================================
--- linux-2.6.orig/drivers/pci/pci-driver.c
+++ linux-2.6/drivers/pci/pci-driver.c
@@ -304,7 +304,7 @@ static void pci_device_shutdown(struct d
* Default "suspend" method for devices that have no driver provided suspend,
* or not even a driver at all (second part).
*/
-static void pci_default_pm_suspend_late(struct pci_dev *pci_dev)
+static void pci_pm_set_unknown_state(struct pci_dev *pci_dev)
{
/*
* mark its power state as "unknown", since we don't know if
@@ -318,7 +318,7 @@ static void pci_default_pm_suspend_late(
* Default "resume" method for devices that have no driver provided resume,
* or not even a driver at all (second part).
*/
-static int pci_default_pm_resume_late(struct pci_dev *pci_dev)
+static int pci_pm_reenable_device(struct pci_dev *pci_dev)
{
int retval;
@@ -349,7 +349,7 @@ static int pci_legacy_suspend(struct dev
* This is for compatibility with existing code with legacy PM
* support.
*/
- pci_default_pm_suspend_late(pci_dev);
+ pci_pm_set_unknown_state(pci_dev);
}
return i;
}
@@ -378,7 +378,7 @@ static int pci_legacy_resume(struct devi
} else {
/* restore the PCI config space */
pci_restore_state(pci_dev);
- error = pci_default_pm_resume_late(pci_dev);
+ error = pci_pm_reenable_device(pci_dev);
}
return error;
}
@@ -445,7 +445,7 @@ static int pci_pm_default_resume(struct
if (!pci_is_bridge(pci_dev))
pci_enable_wake(pci_dev, PCI_D0, false);
- return pci_default_pm_resume_late(pci_dev);
+ return pci_pm_reenable_device(pci_dev);
}
static void pci_pm_default_suspend_generic(struct pci_dev *pci_dev)
@@ -504,17 +504,21 @@ static int pci_pm_suspend(struct device
struct device_driver *drv = dev->driver;
int error = 0;
+ if (pci_has_legacy_pm_support(pci_dev)) {
+ error = pci_legacy_suspend(dev, PMSG_SUSPEND);
+ goto Exit;
+ }
+
if (drv && drv->pm) {
if (drv->pm->suspend) {
error = drv->pm->suspend(dev);
suspend_report_result(drv->pm->suspend, error);
}
- } else if (pci_has_legacy_pm_support(pci_dev)) {
- error = pci_legacy_suspend(dev, PMSG_SUSPEND);
} else {
pci_pm_default_suspend(pci_dev);
}
+ Exit:
pci_fixup_device(pci_fixup_suspend, pci_dev);
return error;
@@ -526,15 +530,16 @@ static int pci_pm_suspend_noirq(struct d
struct device_driver *drv = dev->driver;
int error = 0;
+ if (pci_has_legacy_pm_support(pci_dev))
+ return pci_legacy_suspend_late(dev, PMSG_SUSPEND);
+
if (drv && drv->pm) {
if (drv->pm->suspend_noirq) {
error = drv->pm->suspend_noirq(dev);
suspend_report_result(drv->pm->suspend_noirq, error);
}
- } else if (pci_has_legacy_pm_support(pci_dev)) {
- error = pci_legacy_suspend_late(dev, PMSG_SUSPEND);
} else {
- pci_default_pm_suspend_late(pci_dev);
+ pci_pm_set_unknown_state(pci_dev);
}
return error;
@@ -546,14 +551,16 @@ static int pci_pm_resume(struct device *
struct device_driver *drv = dev->driver;
int error = 0;
+ if (pci_has_legacy_pm_support(pci_dev)) {
+ pci_fixup_device(pci_fixup_resume, pci_dev);
+ return pci_legacy_resume(dev);
+ }
+
if (drv && drv->pm) {
pci_fixup_device(pci_fixup_resume, pci_dev);
if (drv->pm->resume)
error = drv->pm->resume(dev);
- } else if (pci_has_legacy_pm_support(pci_dev)) {
- pci_fixup_device(pci_fixup_resume, pci_dev);
- error = pci_legacy_resume(dev);
} else {
error = pci_pm_default_resume(pci_dev);
}
@@ -567,14 +574,16 @@ static int pci_pm_resume_noirq(struct de
struct device_driver *drv = dev->driver;
int error = 0;
+ if (pci_has_legacy_pm_support(pci_dev)) {
+ pci_fixup_device(pci_fixup_resume_early, pci_dev);
+ return pci_legacy_resume_early(dev);
+ }
+
if (drv && drv->pm) {
pci_fixup_device(pci_fixup_resume_early, pci_dev);
if (drv->pm->resume_noirq)
error = drv->pm->resume_noirq(dev);
- } else if (pci_has_legacy_pm_support(pci_dev)) {
- pci_fixup_device(pci_fixup_resume_early, pci_dev);
- error = pci_legacy_resume_early(dev);
} else {
pci_pm_default_resume_noirq(pci_dev);
}
@@ -599,14 +608,17 @@ static int pci_pm_freeze(struct device *
struct device_driver *drv = dev->driver;
int error = 0;
+ if (pci_has_legacy_pm_support(pci_dev)) {
+ error = pci_legacy_suspend(dev, PMSG_FREEZE);
+ pci_fixup_device(pci_fixup_suspend, pci_dev);
+ return error;
+ }
+
if (drv && drv->pm) {
if (drv->pm->freeze) {
error = drv->pm->freeze(dev);
suspend_report_result(drv->pm->freeze, error);
}
- } else if (pci_has_legacy_pm_support(pci_dev)) {
- error = pci_legacy_suspend(dev, PMSG_FREEZE);
- pci_fixup_device(pci_fixup_suspend, pci_dev);
} else {
pci_pm_default_suspend_generic(pci_dev);
}
@@ -620,15 +632,16 @@ static int pci_pm_freeze_noirq(struct de
struct device_driver *drv = dev->driver;
int error = 0;
+ if (pci_has_legacy_pm_support(pci_dev))
+ return pci_legacy_suspend_late(dev, PMSG_FREEZE);
+
if (drv && drv->pm) {
if (drv->pm->freeze_noirq) {
error = drv->pm->freeze_noirq(dev);
suspend_report_result(drv->pm->freeze_noirq, error);
}
- } else if (pci_has_legacy_pm_support(pci_dev)) {
- error = pci_legacy_suspend_late(dev, PMSG_FREEZE);
} else {
- pci_default_pm_suspend_late(pci_dev);
+ pci_pm_set_unknown_state(pci_dev);
}
return error;
@@ -640,14 +653,16 @@ static int pci_pm_thaw(struct device *de
struct device_driver *drv = dev->driver;
int error = 0;
+ if (pci_has_legacy_pm_support(pci_dev)) {
+ pci_fixup_device(pci_fixup_resume, pci_dev);
+ return pci_legacy_resume(dev);
+ }
+
if (drv && drv->pm) {
if (drv->pm->thaw)
error = drv->pm->thaw(dev);
- } else if (pci_has_legacy_pm_support(pci_dev)) {
- pci_fixup_device(pci_fixup_resume, pci_dev);
- error = pci_legacy_resume(dev);
} else {
- pci_default_pm_resume_late(pci_dev);
+ pci_pm_reenable_device(pci_dev);
}
return error;
@@ -659,12 +674,14 @@ static int pci_pm_thaw_noirq(struct devi
struct device_driver *drv = dev->driver;
int error = 0;
+ if (pci_has_legacy_pm_support(pci_dev)) {
+ pci_fixup_device(pci_fixup_resume_early, to_pci_dev(dev));
+ return pci_legacy_resume_early(dev);
+ }
+
if (drv && drv->pm) {
if (drv->pm->thaw_noirq)
error = drv->pm->thaw_noirq(dev);
- } else if (pci_has_legacy_pm_support(pci_dev)) {
- pci_fixup_device(pci_fixup_resume_early, to_pci_dev(dev));
- error = pci_legacy_resume_early(dev);
} else {
pci_update_current_state(pci_dev, PCI_D0);
}
@@ -678,17 +695,21 @@ static int pci_pm_poweroff(struct device
struct device_driver *drv = dev->driver;
int error = 0;
+ if (pci_has_legacy_pm_support(pci_dev)) {
+ error = pci_legacy_suspend(dev, PMSG_HIBERNATE);
+ goto Exit;
+ }
+
if (drv && drv->pm) {
if (drv->pm->poweroff) {
error = drv->pm->poweroff(dev);
suspend_report_result(drv->pm->poweroff, error);
}
- } else if (pci_has_legacy_pm_support(pci_dev)) {
- error = pci_legacy_suspend(dev, PMSG_HIBERNATE);
} else {
pci_pm_default_suspend(pci_dev);
}
+ Exit:
pci_fixup_device(pci_fixup_suspend, pci_dev);
return error;
@@ -699,13 +720,14 @@ static int pci_pm_poweroff_noirq(struct
struct device_driver *drv = dev->driver;
int error = 0;
+ if (pci_has_legacy_pm_support(to_pci_dev(dev)))
+ return pci_legacy_suspend_late(dev, PMSG_HIBERNATE);
+
if (drv && drv->pm) {
if (drv->pm->poweroff_noirq) {
error = drv->pm->poweroff_noirq(dev);
suspend_report_result(drv->pm->poweroff_noirq, error);
}
- } else if (pci_has_legacy_pm_support(to_pci_dev(dev))) {
- error = pci_legacy_suspend_late(dev, PMSG_HIBERNATE);
}
return error;
@@ -717,14 +739,16 @@ static int pci_pm_restore(struct device
struct device_driver *drv = dev->driver;
int error = 0;
+ if (pci_has_legacy_pm_support(pci_dev)) {
+ pci_fixup_device(pci_fixup_resume, pci_dev);
+ return pci_legacy_resume(dev);
+ }
+
if (drv && drv->pm) {
pci_fixup_device(pci_fixup_resume, pci_dev);
if (drv->pm->restore)
error = drv->pm->restore(dev);
- } else if (pci_has_legacy_pm_support(pci_dev)) {
- pci_fixup_device(pci_fixup_resume, pci_dev);
- error = pci_legacy_resume(dev);
} else {
error = pci_pm_default_resume(pci_dev);
}
@@ -738,14 +762,16 @@ static int pci_pm_restore_noirq(struct d
struct device_driver *drv = dev->driver;
int error = 0;
+ if (pci_has_legacy_pm_support(pci_dev)) {
+ pci_fixup_device(pci_fixup_resume_early, pci_dev);
+ return pci_legacy_resume_early(dev);
+ }
+
if (drv && drv->pm) {
pci_fixup_device(pci_fixup_resume_early, pci_dev);
if (drv->pm->restore_noirq)
error = drv->pm->restore_noirq(dev);
- } else if (pci_has_legacy_pm_support(pci_dev)) {
- pci_fixup_device(pci_fixup_resume_early, pci_dev);
- error = pci_legacy_resume_early(dev);
} else {
pci_pm_default_resume_noirq(pci_dev);
}
--
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