45 lines
1.4 KiB
Diff
45 lines
1.4 KiB
Diff
From 90e70b1b017977048c2740ae9aac647f75d9d24a Mon Sep 17 00:00:00 2001
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From: Maximilian Luz <luzmaximilian@gmail.com>
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Date: Fri, 2 Jul 2021 15:51:07 +0200
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Subject: [PATCH] Revert "Revert "PCI: PM: Do not read power state in
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pci_enable_device_flags()""
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This reverts commit 4d6035f9bf4ea12776322746a216e856dfe46698.
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Patchset: surface-hotplug
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---
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drivers/pci/pci.c | 16 +++-------------
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1 file changed, 3 insertions(+), 13 deletions(-)
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diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
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index 8d4ebe095d0c..b717680377a9 100644
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--- a/drivers/pci/pci.c
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+++ b/drivers/pci/pci.c
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@@ -1900,20 +1900,10 @@ static int pci_enable_device_flags(struct pci_dev *dev, unsigned long flags)
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int err;
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int i, bars = 0;
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- /*
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- * Power state could be unknown at this point, either due to a fresh
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- * boot or a device removal call. So get the current power state
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- * so that things like MSI message writing will behave as expected
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- * (e.g. if the device really is in D0 at enable time).
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- */
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- if (dev->pm_cap) {
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- u16 pmcsr;
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- pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pmcsr);
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- dev->current_state = (pmcsr & PCI_PM_CTRL_STATE_MASK);
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- }
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-
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- if (atomic_inc_return(&dev->enable_cnt) > 1)
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+ if (atomic_inc_return(&dev->enable_cnt) > 1) {
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+ pci_update_current_state(dev, dev->current_state);
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return 0; /* already enabled */
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+ }
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bridge = pci_upstream_bridge(dev);
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if (bridge)
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--
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2.33.0
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