Merge "cnss2: Check driver link state before prevent/allow PCIe L1" (167aea4c) · Commits · e / devices / android_kernel_fairphone_FP4

drivers/net/wireless/cnss2/pci.c

+32 −0

Original line number	Diff line number	Diff line
		@@ -775,6 +775,22 @@ int cnss_resume_pci_link(struct cnss_pci_data *pci_priv)
		int cnss_pci_prevent_l1(struct device *dev)
		{
		struct pci_dev *pci_dev = to_pci_dev(dev);
		struct cnss_pci_data *pci_priv = cnss_get_pci_priv(pci_dev);

		if (!pci_priv) {
		cnss_pr_err("pci_priv is NULL\n");
		return -ENODEV;
		}

		if (pci_priv->pci_link_state == PCI_LINK_DOWN) {
		cnss_pr_dbg("PCIe link is suspended\n");
		return -EIO;
		}

		if (pci_priv->pci_link_down_ind) {
		cnss_pr_err("PCIe link is down\n");
		return -EIO;
		}

		return msm_pcie_prevent_l1(pci_dev);
		}
		@@ -783,6 +799,22 @@ EXPORT_SYMBOL(cnss_pci_prevent_l1);
		void cnss_pci_allow_l1(struct device *dev)
		{
		struct pci_dev *pci_dev = to_pci_dev(dev);
		struct cnss_pci_data *pci_priv = cnss_get_pci_priv(pci_dev);

		if (!pci_priv) {
		cnss_pr_err("pci_priv is NULL\n");
		return;
		}

		if (pci_priv->pci_link_state == PCI_LINK_DOWN) {
		cnss_pr_dbg("PCIe link is suspended\n");
		return;
		}

		if (pci_priv->pci_link_down_ind) {
		cnss_pr_err("PCIe link is down\n");
		return;
		}

		msm_pcie_allow_l1(pci_dev);
		}