From: Bjorn Helgaas <helgaas@kernel.org>
To: Dexuan Cui <decui@microsoft.com>
Cc: "Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Michael Kelley <mikelley@microsoft.com>,
Sasha Levin <Alexander.Levin@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
KY Srinivasan <kys@microsoft.com>,
Stephen Hemminger <sthemmin@microsoft.com>,
olaf@aepfle.de, apw@canonical.com, jasowang@redhat.com,
vkuznets@redhat.com, marcelo.cerri@canonical.com,
jackm@mellanox.com, linux-pci@vger.kernel.org,
linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org,
driverdev-devel@linuxdriverproject.org,
Bjorn Helgaas <bhelgaas@google.com>
Subject: [PATCH 7/7] PCI/MSI: Move power state check out of pci_msi_supported()
Date: Mon, 14 Oct 2019 18:00:16 -0500 [thread overview]
Message-ID: <20191014230016.240912-8-helgaas@kernel.org> (raw)
In-Reply-To: <20191014230016.240912-1-helgaas@kernel.org>
From: Bjorn Helgaas <bhelgaas@google.com>
27e20603c54b ("PCI/MSI: Move D0 check into pci_msi_check_device()")
moved the power state check into pci_msi_check_device(), which was
subsequently renamed to pci_msi_supported(). This didn't change the
behavior, since both callers checked the power state.
However, it doesn't fit the current "pci_msi_supported()" name, which
should return what the device is capable of, independent of the power
state.
Move the power state check back into the callers for readability. No
functional change intended.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
drivers/pci/msi.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 0884bedcfc7a..20e9c729617c 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -861,7 +861,7 @@ static int pci_msi_supported(struct pci_dev *dev, int nvec)
if (!pci_msi_enable)
return 0;
- if (!dev || dev->no_msi || dev->current_state != PCI_D0)
+ if (!dev || dev->no_msi)
return 0;
/*
@@ -972,7 +972,7 @@ static int __pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries,
int nr_entries;
int i, j;
- if (!pci_msi_supported(dev, nvec))
+ if (!pci_msi_supported(dev, nvec) || dev->current_state != PCI_D0)
return -EINVAL;
nr_entries = pci_msix_vec_count(dev);
@@ -1058,7 +1058,7 @@ static int __pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec,
int nvec;
int rc;
- if (!pci_msi_supported(dev, minvec))
+ if (!pci_msi_supported(dev, minvec) || dev->current_state != PCI_D0)
return -EINVAL;
/* Check whether driver already requested MSI-X IRQs */
--
2.23.0.700.g56cf767bdb-goog
next prev parent reply other threads:[~2019-10-14 23:02 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-14 23:00 [PATCH v3 0/7] PCI: PM: Move to D0 before calling pci_legacy_resume_early() Bjorn Helgaas
2019-10-14 23:00 ` [PATCH 1/7] PCI/PM: Always return devices to D0 when thawing Bjorn Helgaas
2019-10-15 17:15 ` Rafael J. Wysocki
2019-10-14 23:00 ` [PATCH 2/7] PCI/PM: Correct pci_pm_thaw_noirq() documentation Bjorn Helgaas
2019-10-15 17:17 ` Rafael J. Wysocki
2019-10-14 23:00 ` [PATCH 3/7] PCI/PM: Clear PCIe PME Status even for legacy power management Bjorn Helgaas
2019-10-15 17:20 ` Rafael J. Wysocki
2019-10-14 23:00 ` [PATCH 4/7] PCI/PM: Run resume fixups before disabling wakeup events Bjorn Helgaas
2019-10-15 17:21 ` Rafael J. Wysocki
2019-10-14 23:00 ` [PATCH 5/7] PCI/PM: Make power management op coding style consistent Bjorn Helgaas
2019-10-15 17:22 ` Rafael J. Wysocki
2019-10-16 13:50 ` Dan Carpenter
2019-10-14 23:00 ` [PATCH 6/7] PCI/PM: Wrap long lines in documentation Bjorn Helgaas
2019-10-15 17:23 ` Rafael J. Wysocki
2019-10-14 23:00 ` Bjorn Helgaas [this message]
2019-10-15 17:24 ` [PATCH 7/7] PCI/MSI: Move power state check out of pci_msi_supported() Rafael J. Wysocki
2019-10-15 18:24 ` [PATCH v3 0/7] PCI: PM: Move to D0 before calling pci_legacy_resume_early() Dexuan Cui
2019-10-15 18:42 ` Bjorn Helgaas
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