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Commit 542be884 authored by Yue Ma's avatar Yue Ma
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cnss2: Avoid race condition between time sync and system suspend 



Add mutex to protect time sync operation and PCIe bus suspend from
system suspend to avoid race condition between msm_pcie_pm_suspend
and msm_pcie_prevent_l1/allow_l1.

Change-Id: I8ff0f258e8928b97deeada134982ee2cbe93ae9a
Signed-off-by: default avatarYue Ma <yuem@codeaurora.org>
parent 06a7c1db

drivers/net/wireless/cnss2/pci.c

+4 −0
Original line number Diff line number Diff line
@@ -1685,7 +1685,9 @@ static void cnss_pci_time_sync_work_hdlr(struct work_struct *work) 
	if (cnss_pci_pm_runtime_get_sync(pci_priv, RTPM_ID_CNSS) < 0)

		goto runtime_pm_put;



	mutex_lock(&pci_priv->bus_lock);

	cnss_pci_update_timestamp(pci_priv);

	mutex_unlock(&pci_priv->bus_lock);

	schedule_delayed_work(&pci_priv->time_sync_work,

			      msecs_to_jiffies(time_sync_period_ms));
@@ -2791,7 +2793,9 @@ static int cnss_pci_suspend(struct device *dev) 
		goto clear_flag;



	if (!pci_priv->disable_pc) {

		mutex_lock(&pci_priv->bus_lock);

		ret = cnss_pci_suspend_bus(pci_priv);

		mutex_unlock(&pci_priv->bus_lock);

		if (ret)

			goto resume_driver;

	}