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Commit 1508a1fc authored by Yue Ma's avatar Yue Ma
Browse files

cnss2: Check driver link state before prevent/allow PCIe L1 



Avoid calling prevent/allow PCIe L1 APIs if driver has already known
link is not accessible.

Change-Id: Ia12c6b932fb7d99916ca2b76323bd2c01bdb655d
Signed-off-by: default avatarYue Ma <yuem@codeaurora.org>
parent 10da9faf

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);

}