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authorBjorn Helgaas <bhelgaas@google.com>2021-01-27 09:50:41 -0600
committerBjorn Helgaas <bhelgaas@google.com>2021-01-27 10:12:43 -0600
commit40fb68c7725aee024ed99ad38504f5d25820c6f0 (patch)
tree453ed4eb6f525db9304b0f5f6eaa08b0bf77a26f /drivers/pci/pcie
parent7c53f6b671f4aba70ff15e1b05148b10d58c2837 (diff)
Revert "PCI/ASPM: Save/restore L1SS Capability for suspend/resume"
This reverts commit 4257f7e008ea394fcecc050f1569c3503b8bcc15. Kenneth reported that after 4257f7e008ea, he sees a torrent of disk I/O errors on his NVMe device after suspend/resume until a reboot. Link: https://lore.kernel.org/linux-pci/20201228040513.GA611645@bjorn-Precision-5520/ Reported-by: Kenneth R. Crudup <kenny@panix.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/pcie')
-rw-r--r--drivers/pci/pcie/aspm.c44
1 files changed, 0 insertions, 44 deletions
diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c
index a08e7d6dc248..ac0557a305af 100644
--- a/drivers/pci/pcie/aspm.c
+++ b/drivers/pci/pcie/aspm.c
@@ -734,50 +734,6 @@ static void pcie_config_aspm_l1ss(struct pcie_link_state *link, u32 state)
PCI_L1SS_CTL1_L1SS_MASK, val);
}
-void pci_save_aspm_l1ss_state(struct pci_dev *dev)
-{
- int aspm_l1ss;
- struct pci_cap_saved_state *save_state;
- u32 *cap;
-
- if (!pci_is_pcie(dev))
- return;
-
- aspm_l1ss = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_L1SS);
- if (!aspm_l1ss)
- return;
-
- save_state = pci_find_saved_ext_cap(dev, PCI_EXT_CAP_ID_L1SS);
- if (!save_state)
- return;
-
- cap = (u32 *)&save_state->cap.data[0];
- pci_read_config_dword(dev, aspm_l1ss + PCI_L1SS_CTL1, cap++);
- pci_read_config_dword(dev, aspm_l1ss + PCI_L1SS_CTL2, cap++);
-}
-
-void pci_restore_aspm_l1ss_state(struct pci_dev *dev)
-{
- int aspm_l1ss;
- struct pci_cap_saved_state *save_state;
- u32 *cap;
-
- if (!pci_is_pcie(dev))
- return;
-
- aspm_l1ss = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_L1SS);
- if (!aspm_l1ss)
- return;
-
- save_state = pci_find_saved_ext_cap(dev, PCI_EXT_CAP_ID_L1SS);
- if (!save_state)
- return;
-
- cap = (u32 *)&save_state->cap.data[0];
- pci_write_config_dword(dev, aspm_l1ss + PCI_L1SS_CTL1, *cap++);
- pci_write_config_dword(dev, aspm_l1ss + PCI_L1SS_CTL2, *cap++);
-}
-
static void pcie_config_aspm_dev(struct pci_dev *pdev, u32 val)
{
pcie_capability_clear_and_set_word(pdev, PCI_EXP_LNKCTL,