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Message-Id: <20191014230016.240912-6-helgaas@kernel.org>
Date: Mon, 14 Oct 2019 18:00:14 -0500
From: Bjorn Helgaas <helgaas@...nel.org>
To: Dexuan Cui <decui@...rosoft.com>
Cc: "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
Michael Kelley <mikelley@...rosoft.com>,
Sasha Levin <Alexander.Levin@...rosoft.com>,
Haiyang Zhang <haiyangz@...rosoft.com>,
KY Srinivasan <kys@...rosoft.com>,
Stephen Hemminger <sthemmin@...rosoft.com>, olaf@...fle.de,
apw@...onical.com, jasowang@...hat.com, vkuznets@...hat.com,
marcelo.cerri@...onical.com, jackm@...lanox.com,
linux-pci@...r.kernel.org, linux-hyperv@...r.kernel.org,
linux-kernel@...r.kernel.org,
driverdev-devel@...uxdriverproject.org,
Bjorn Helgaas <bhelgaas@...gle.com>
Subject: [PATCH 5/7] PCI/PM: Make power management op coding style consistent
From: Bjorn Helgaas <bhelgaas@...gle.com>
Some of the power management ops use this style:
struct device_driver *drv = dev->driver;
if (drv && drv->pm && drv->pm->prepare(dev))
drv->pm->prepare(dev);
while others use this:
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
if (pm && pm->runtime_resume)
pm->runtime_resume(dev);
Convert the first style to the second so they're all consistent. Remove
local "error" variables when unnecessary. No functional change intended.
Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
---
drivers/pci/pci-driver.c | 76 +++++++++++++++++++---------------------
1 file changed, 36 insertions(+), 40 deletions(-)
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 55acb658273f..abbf5c39cb9c 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -679,11 +679,11 @@ static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev)
static int pci_pm_prepare(struct device *dev)
{
- struct device_driver *drv = dev->driver;
struct pci_dev *pci_dev = to_pci_dev(dev);
+ const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
- if (drv && drv->pm && drv->pm->prepare) {
- int error = drv->pm->prepare(dev);
+ if (pm && pm->prepare) {
+ int error = pm->prepare(dev);
if (error < 0)
return error;
@@ -917,8 +917,7 @@ static int pci_pm_suspend_noirq(struct device *dev)
static int pci_pm_resume_noirq(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
- struct device_driver *drv = dev->driver;
- int error = 0;
+ const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
if (dev_pm_may_skip_resume(dev))
return 0;
@@ -946,17 +945,16 @@ static int pci_pm_resume_noirq(struct device *dev)
if (pci_has_legacy_pm_support(pci_dev))
return pci_legacy_resume_early(dev);
- if (drv && drv->pm && drv->pm->resume_noirq)
- error = drv->pm->resume_noirq(dev);
+ if (pm && pm->resume_noirq)
+ return pm->resume_noirq(dev);
- return error;
+ return 0;
}
static int pci_pm_resume(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
- int error = 0;
/*
* This is necessary for the suspend error path in which resume is
@@ -972,12 +970,12 @@ static int pci_pm_resume(struct device *dev)
if (pm) {
if (pm->resume)
- error = pm->resume(dev);
+ return pm->resume(dev);
} else {
pci_pm_reenable_device(pci_dev);
}
- return error;
+ return 0;
}
#else /* !CONFIG_SUSPEND */
@@ -1038,16 +1036,16 @@ static int pci_pm_freeze(struct device *dev)
static int pci_pm_freeze_noirq(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
- struct device_driver *drv = dev->driver;
+ 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_FREEZE);
- if (drv && drv->pm && drv->pm->freeze_noirq) {
+ if (pm && pm->freeze_noirq) {
int error;
- error = drv->pm->freeze_noirq(dev);
- suspend_report_result(drv->pm->freeze_noirq, error);
+ error = pm->freeze_noirq(dev);
+ suspend_report_result(pm->freeze_noirq, error);
if (error)
return error;
}
@@ -1066,8 +1064,8 @@ static int pci_pm_freeze_noirq(struct device *dev)
static int pci_pm_thaw_noirq(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
- struct device_driver *drv = dev->driver;
- int error = 0;
+ const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
+ int error;
if (pcibios_pm_ops.thaw_noirq) {
error = pcibios_pm_ops.thaw_noirq(dev);
@@ -1091,10 +1089,10 @@ static int pci_pm_thaw_noirq(struct device *dev)
if (pci_has_legacy_pm_support(pci_dev))
return pci_legacy_resume_early(dev);
- if (drv && drv->pm && drv->pm->thaw_noirq)
- error = drv->pm->thaw_noirq(dev);
+ if (pm && pm->thaw_noirq)
+ return pm->thaw_noirq(dev);
- return error;
+ return 0;
}
static int pci_pm_thaw(struct device *dev)
@@ -1165,24 +1163,24 @@ static int pci_pm_poweroff_late(struct device *dev)
static int pci_pm_poweroff_noirq(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
- struct device_driver *drv = dev->driver;
+ const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
if (dev_pm_smart_suspend_and_suspended(dev))
return 0;
- if (pci_has_legacy_pm_support(to_pci_dev(dev)))
+ if (pci_has_legacy_pm_support(pci_dev))
return pci_legacy_suspend_late(dev, PMSG_HIBERNATE);
- if (!drv || !drv->pm) {
+ if (!pm) {
pci_fixup_device(pci_fixup_suspend_late, pci_dev);
return 0;
}
- if (drv->pm->poweroff_noirq) {
+ if (pm->poweroff_noirq) {
int error;
- error = drv->pm->poweroff_noirq(dev);
- suspend_report_result(drv->pm->poweroff_noirq, error);
+ error = pm->poweroff_noirq(dev);
+ suspend_report_result(pm->poweroff_noirq, error);
if (error)
return error;
}
@@ -1208,8 +1206,8 @@ static int pci_pm_poweroff_noirq(struct device *dev)
static int pci_pm_restore_noirq(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
- struct device_driver *drv = dev->driver;
- int error = 0;
+ const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
+ int error;
if (pcibios_pm_ops.restore_noirq) {
error = pcibios_pm_ops.restore_noirq(dev);
@@ -1223,17 +1221,16 @@ static int pci_pm_restore_noirq(struct device *dev)
if (pci_has_legacy_pm_support(pci_dev))
return pci_legacy_resume_early(dev);
- if (drv && drv->pm && drv->pm->restore_noirq)
- error = drv->pm->restore_noirq(dev);
+ if (pm && pm->restore_noirq)
+ return pm->restore_noirq(dev);
- return error;
+ return 0;
}
static int pci_pm_restore(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
- int error = 0;
/*
* This is necessary for the hibernation error path in which restore is
@@ -1249,12 +1246,12 @@ static int pci_pm_restore(struct device *dev)
if (pm) {
if (pm->restore)
- error = pm->restore(dev);
+ return pm->restore(dev);
} else {
pci_pm_reenable_device(pci_dev);
}
- return error;
+ return 0;
}
#else /* !CONFIG_HIBERNATE_CALLBACKS */
@@ -1330,9 +1327,9 @@ static int pci_pm_runtime_suspend(struct device *dev)
static int pci_pm_runtime_resume(struct device *dev)
{
- int rc = 0;
struct pci_dev *pci_dev = to_pci_dev(dev);
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
+ int error = 0;
/*
* Restoring config space is necessary even if the device is not bound
@@ -1348,18 +1345,17 @@ static int pci_pm_runtime_resume(struct device *dev)
pci_pm_default_resume(pci_dev);
if (pm && pm->runtime_resume)
- rc = pm->runtime_resume(dev);
+ error = pm->runtime_resume(dev);
pci_dev->runtime_d3cold = false;
- return rc;
+ return error;
}
static int pci_pm_runtime_idle(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
- int ret = 0;
/*
* If pci_dev->driver is not set (unbound), the device should
@@ -1372,9 +1368,9 @@ static int pci_pm_runtime_idle(struct device *dev)
return -ENOSYS;
if (pm->runtime_idle)
- ret = pm->runtime_idle(dev);
+ return pm->runtime_idle(dev);
- return ret;
+ return 0;
}
static const struct dev_pm_ops pci_dev_pm_ops = {
--
2.23.0.700.g56cf767bdb-goog
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