[PATCH 2/6] ath11k: add ce and ext irq flag to indicate irq_handler

[Carl Huang]

This change adds two flags to indicate whether irq handler for CE
and dp can be called. This is because in one MSI vector case,
interrupt is not disabled in hif_stop and hif_irq_disable. Otherwise,
MHI interrupt is disabled too.

Tested-on: QCA6390 hw2.0 PCI WLAN.HST.1.0.1-01740-QCAHSTSWPLZ_V2_TO_X86-1

Signed-off-by: Carl Huang <cjhuang at codeaurora.org>
---
 drivers/net/wireless/ath/ath11k/core.h |  2 ++
 drivers/net/wireless/ath/ath11k/pci.c  | 13 +++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/drivers/net/wireless/ath/ath11k/core.h b/drivers/net/wireless/ath/ath11k/core.h
index 799bf3d..3dacca5 100644
--- a/drivers/net/wireless/ath/ath11k/core.h
+++ b/drivers/net/wireless/ath/ath11k/core.h
@@ -741,6 +741,8 @@ struct ath11k_base {
 
 	struct completion htc_suspend;
 
+	bool ce_irq_enabled_flag;
+	bool ext_irq_enabled_flag;
 	/* must be last */
 	u8 drv_priv[0] __aligned(sizeof(void *));
 };
diff --git a/drivers/net/wireless/ath/ath11k/pci.c b/drivers/net/wireless/ath/ath11k/pci.c
index c1ae1df..deb2d47 100644
--- a/drivers/net/wireless/ath/ath11k/pci.c
+++ b/drivers/net/wireless/ath/ath11k/pci.c
@@ -487,6 +487,8 @@ static void ath11k_pci_ce_irqs_disable(struct ath11k_base *ab)
 {
 	int i;
 
+	ab->ce_irq_enabled_flag = false;
+
 	for (i = 0; i < ab->hw_params.ce_count; i++) {
 		if (ath11k_ce_get_attr_flags(ab, i) & CE_ATTR_DIS_INTR)
 			continue;
@@ -521,6 +523,9 @@ static irqreturn_t ath11k_pci_ce_interrupt_handler(int irq, void *arg)
 {
 	struct ath11k_ce_pipe *ce_pipe = arg;
 
+	if (!ab->ce_irq_enabled_flag)
+		return IRQ_HANDLED;
+
 	ath11k_pci_ce_irq_disable(ce_pipe->ab, ce_pipe->pipe_num);
 	tasklet_schedule(&ce_pipe->intr_tq);
 
@@ -539,6 +544,8 @@ static void __ath11k_pci_ext_irq_disable(struct ath11k_base *sc)
 {
 	int i;
 
+	ab->ext_irq_enabled_flag = false;
+
 	for (i = 0; i < ATH11K_EXT_IRQ_GRP_NUM_MAX; i++) {
 		struct ath11k_ext_irq_grp *irq_grp = &sc->ext_irq_grp[i];
 
@@ -561,6 +568,8 @@ static void ath11k_pci_ext_irq_enable(struct ath11k_base *ab)
 {
 	int i;
 
+	ab->ext_irq_enabled_flag = true;
+
 	for (i = 0; i < ATH11K_EXT_IRQ_GRP_NUM_MAX; i++) {
 		struct ath11k_ext_irq_grp *irq_grp = &ab->ext_irq_grp[i];
 
@@ -613,6 +622,9 @@ static irqreturn_t ath11k_pci_ext_interrupt_handler(int irq, void *arg)
 {
 	struct ath11k_ext_irq_grp *irq_grp = arg;
 
+	if (!irq_grp->ab->ext_irq_enabled_flag)
+		return IRQ_HANDLED;
+
 	ath11k_dbg(irq_grp->ab, ATH11K_DBG_PCI, "ext irq:%d\n", irq);
 
 	ath11k_pci_ext_grp_disable(irq_grp);
@@ -1026,6 +1038,7 @@ static int ath11k_pci_start(struct ath11k_base *ab)
 	set_bit(ATH11K_PCI_FLAG_INIT_DONE, &ab_pci->flags);
 
 	ath11k_pci_aspm_restore(ab_pci);
+	ab->ce_irq_enabled_flag = true;
 
 	ath11k_pci_ce_irqs_enable(ab);
 	ath11k_ce_rx_post_buf(ab);
-- 
2.7.4