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| author | Lukas Wunner <lukas@wunner.de> | 2018-07-20 00:27:54 +0200 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2018-07-31 18:07:59 +0200 |
| commit | 469e764c4a3c7260b353b7bc1bd56c283cb001da (patch) | |
| tree | 1e07c0b18b5c7ede6ba7208777e660dc1a18f542 /kernel/utsname_sysctl.c | |
| parent | PCI: pciehp: Clear spurious events earlier on resume (diff) | |
| download | linux-469e764c4a3c7260b353b7bc1bd56c283cb001da.tar.xz linux-469e764c4a3c7260b353b7bc1bd56c283cb001da.zip | |
PCI: pciehp: Obey compulsory command delay after resume
Upon resume from system sleep, the Slot Control register is written via:
pci_pm_resume_noirq()
pci_pm_default_resume_early()
pci_restore_state()
pci_restore_pcie_state()
PCIe r4.0, sec 6.7.3.2 says that after "issuing a write transaction that
targets any portion of the Port's Slot Control register, [...] software
must wait for [the] command to complete before issuing the next command".
pciehp currently fails to enforce that rule after the above-mentioned
write. Fix it.
(Moving restoration of the Slot Control register to pciehp doesn't seem
to make sense because the other PCIe hotplug drivers may need it as
well.)
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'kernel/utsname_sysctl.c')
0 files changed, 0 insertions, 0 deletions