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Commit 4b6e0521 authored by Yue Ma's avatar Yue Ma
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cnss2: Make sure PCIe/MHI is up before collecting RAM dump 



There may be race condition between firmware assert and runtime PM
suspend. Hence make sure PCIe/MHI is up before collecting RAM dump.

Change-Id: I9a76bf96c4a72045d31449ed9f760e498ae78789
Signed-off-by: default avatarYue Ma <yuem@codeaurora.org>
parent 1d462075

drivers/net/wireless/cnss2/pci.c

+19 −3
Original line number Diff line number Diff line
@@ -385,7 +385,7 @@ int cnss_pci_check_link_status(struct cnss_pci_data *pci_priv) 


	if (pci_priv->pci_link_state == PCI_LINK_DOWN) {

		cnss_pr_dbg("PCIe link is suspended\n");

		return -EIO;

		return -EACCES;

	}



	if (pci_priv->pci_link_down_ind) {
@@ -3973,8 +3973,24 @@ void cnss_pci_collect_dump_info(struct cnss_pci_data *pci_priv, bool in_panic) 
		return;

	}



	if (!in_panic) {

		mutex_lock(&pci_priv->bus_lock);

		ret = cnss_pci_check_link_status(pci_priv);

		if (ret) {

			if (ret != -EACCES) {

				mutex_unlock(&pci_priv->bus_lock);

				return;

			}

			if (cnss_pci_resume_bus(pci_priv)) {

				mutex_unlock(&pci_priv->bus_lock);

				return;

			}

		}

		mutex_unlock(&pci_priv->bus_lock);

	} else {

		if (cnss_pci_check_link_status(pci_priv))

			return;

	}



	cnss_pci_dump_misc_reg(pci_priv);

	cnss_pci_dump_qdss_reg(pci_priv);