evie/android_kernel_oneplus_msm8998
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msm: pcie: always recover cfg space during resume

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During linkdown pci host cannot save the config space
prior to suspending the link. If saved_state is null
recover rc config space using shadow recovery.

CRs-Fixed: 2141146
Change-Id: I6c6e817ae2c32d8040853fe22785040480aa76eb
Signed-off-by: Sujeev Dias <sdias@codeaurora.org>
This commit is contained in:
Sujeev Dias 2017-10-10 10:57:48 -07:00
parent f2dfcc956e
commit 4f3f403a2e
1 changed files with 16 additions and 9 deletions
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25
drivers/pci/host/pci-msm.c
View file

@ -6865,17 +6865,24 @@ static int msm_pcie_pm_resume(struct pci_dev *dev,
dev->bus->number, dev->bus->primary);
if (!(options & MSM_PCIE_CONFIG_NO_CFG_RESTORE)) {
PCIE_DBG(pcie_dev,
"RC%d: entry of PCI framework restore state\n",
pcie_dev->rc_idx);
if (pcie_dev->saved_state) {
PCIE_DBG(pcie_dev,
"RC%d: entry of PCI framework restore state\n",
pcie_dev->rc_idx);
pci_load_and_free_saved_state(dev,
&pcie_dev->saved_state);
pci_restore_state(dev);
pci_load_and_free_saved_state(dev,
&pcie_dev->saved_state);
pci_restore_state(dev);
PCIE_DBG(pcie_dev,
"RC%d: exit of PCI framework restore state\n",
pcie_dev->rc_idx);
PCIE_DBG(pcie_dev,
"RC%d: exit of PCI framework restore state\n",
pcie_dev->rc_idx);
} else {
PCIE_DBG(pcie_dev,
"RC%d: restore rc config space using shadow recovery\n",
pcie_dev->rc_idx);
msm_pcie_cfg_recover(pcie_dev, true);
}
}
}