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Commit 9fa22520 authored by Yue Ma's avatar Yue Ma
Browse files

cnss2: Avoid checking PCIe status in IRQ or IRQ disable context 



PCIe config space read during checking PCIe status may take a few
milliseconds, so avoid checking PCIe status in IRQ or IRQ disable
context for such cases before accessing any registers.

Change-Id: Ib63ae8f47e27bd607300bd304adbb000ba59f27e
Signed-off-by: default avatarYue Ma <yuem@codeaurora.org>
parent 2828b2b3

drivers/net/wireless/cnss2/pci.c

+10 −6
Original line number Diff line number Diff line
@@ -396,9 +396,11 @@ static int cnss_pci_reg_read(struct cnss_pci_data *pci_priv, 
{

	int ret;



	if (!in_interrupt() && !irqs_disabled()) {

		ret = cnss_pci_check_link_status(pci_priv);

		if (ret)

			return ret;

	}



	if (pci_priv->pci_dev->device == QCA6174_DEVICE_ID ||

	    offset < MAX_UNWINDOWED_ADDRESS) {
@@ -421,9 +423,11 @@ static int cnss_pci_reg_write(struct cnss_pci_data *pci_priv, u32 offset, 
{

	int ret;



	if (!in_interrupt() && !irqs_disabled()) {

		ret = cnss_pci_check_link_status(pci_priv);

		if (ret)

			return ret;

	}



	if (pci_priv->pci_dev->device == QCA6174_DEVICE_ID ||

	    offset < MAX_UNWINDOWED_ADDRESS) {