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Merge branch 'pci/hotplug'

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- Clear pciehp cmd_busy bit when command completes in polling mode to avoid
  spurious timeouts (Liguang Zhang)

- Add quirk to work around Qualcomm hardware defect in Command Completed
  signaling (Manivannan Sadhasivam)

* pci/hotplug:
  PCI: pciehp: Add Qualcomm quirk for Command Completed erratum
  PCI: pciehp: Clear cmd_busy bit in polling mode
This commit is contained in:
Bjorn Helgaas 2022-03-22 17:16:20 -05:00
commit f787b68214
1 changed files with 4 additions and 0 deletions
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4
drivers/pci/hotplug/pciehp_hpc.c
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@ -98,6 +98,8 @@ static int pcie_poll_cmd(struct controller *ctrl, int timeout)
if (slot_status & PCI_EXP_SLTSTA_CC) {
pcie_capability_write_word(pdev, PCI_EXP_SLTSTA,
PCI_EXP_SLTSTA_CC);
ctrl->cmd_busy = 0;
smp_mb();
return 1;
}
msleep(10);
@ -1084,6 +1086,8 @@ static void quirk_cmd_compl(struct pci_dev *pdev)
}
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, PCI_ANY_ID,
PCI_CLASS_BRIDGE_PCI, 8, quirk_cmd_compl);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_QCOM, 0x0110,
PCI_CLASS_BRIDGE_PCI, 8, quirk_cmd_compl);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_QCOM, 0x0400,
PCI_CLASS_BRIDGE_PCI, 8, quirk_cmd_compl);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_QCOM, 0x0401,