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| author |   Bjorn Helgaas <bhelgaas@google.com> | 2020-04-07 18:23:15 -0500 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2020-04-24 14:33:47 -0500 |
| commit | c3aaf086701d05a82c8156ee8620af41e5a7d6fe (patch) | |
| tree | a17393052db8d1f4cbedbbde64d4e7fea0004d32 /drivers/pci/pci.c | |
| parent | Linux 5.7-rc1 (diff) | |
| download | wireguard-linux-c3aaf086701d05a82c8156ee8620af41e5a7d6fe.tar.xz wireguard-linux-c3aaf086701d05a82c8156ee8620af41e5a7d6fe.zip | |
PCI/PM: Call .bridge_d3() hook only if non-NULL
26ad34d510a8 ("PCI / ACPI: Whitelist D3 for more PCIe hotplug ports") added
the struct pci_platform_pm_ops.bridge_d3() function pointer and
platform_pci_bridge_d3() to use it.
The .bridge_d3() op is implemented by acpi_pci_platform_pm, but not by
mid_pci_platform_pm. We don't expect platform_pci_bridge_d3() to be called
on Intel MID platforms, but nothing in the code itself would prevent that.
Check the .bridge_d3() pointer for NULL before calling it.
Fixes: 26ad34d510a8 ("PCI / ACPI: Whitelist D3 for more PCIe hotplug ports")
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/pci/pci.c')
| -rw-r--r-- | drivers/pci/pci.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 595fcf59843f..dfa7ec008963 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -868,7 +868,9 @@ static inline bool platform_pci_need_resume(struct pci_dev *dev) static inline bool platform_pci_bridge_d3(struct pci_dev *dev) { - return pci_platform_pm ? pci_platform_pm->bridge_d3(dev) : false; + if (pci_platform_pm && pci_platform_pm->bridge_d3) + return pci_platform_pm->bridge_d3(dev); + return false; } /** |