1 files changed, 43 insertions, 10 deletions

diff --git a/drivers/net/wwan/t7xx/t7xx_pci.c b/drivers/net/wwan/t7xx/t7xx_pci.c
index 10a8c1080b10..e556e5bd49ab 100644
--- a/drivers/net/wwan/t7xx/t7xx_pci.c
+++ b/drivers/net/wwan/t7xx/t7xx_pci.c
@@ -69,6 +69,7 @@ static ssize_t t7xx_mode_store(struct device *dev,
 {
 	struct t7xx_pci_dev *t7xx_dev;
 	struct pci_dev *pdev;
+	enum t7xx_mode mode;
 	int index = 0;
 
 	pdev = to_pci_dev(dev);
@@ -76,12 +77,22 @@ static ssize_t t7xx_mode_store(struct device *dev,
 	if (!t7xx_dev)
 		return -ENODEV;
 
+	mode = READ_ONCE(t7xx_dev->mode);
+
 	index = sysfs_match_string(t7xx_mode_names, buf);
+	if (index == mode)
+		return -EBUSY;
+
 	if (index == T7XX_FASTBOOT_SWITCHING) {
+		if (mode == T7XX_FASTBOOT_DOWNLOAD)
+			return count;
+
 		WRITE_ONCE(t7xx_dev->mode, T7XX_FASTBOOT_SWITCHING);
+		pm_runtime_resume(dev);
+		t7xx_reset_device(t7xx_dev, FASTBOOT);
 	} else if (index == T7XX_RESET) {
-		WRITE_ONCE(t7xx_dev->mode, T7XX_RESET);
-		t7xx_acpi_pldr_func(t7xx_dev);
+		pm_runtime_resume(dev);
+		t7xx_reset_device(t7xx_dev, PLDR);
 	}
 
 	return count;
@@ -446,7 +457,7 @@ static int t7xx_pcie_reinit(struct t7xx_pci_dev *t7xx_dev, bool is_d3)
 
 	if (is_d3) {
 		t7xx_mhccif_init(t7xx_dev);
-		return t7xx_pci_pm_reinit(t7xx_dev);
+		t7xx_pci_pm_reinit(t7xx_dev);
 	}
 
 	return 0;
@@ -481,6 +492,33 @@ static int t7xx_send_fsm_command(struct t7xx_pci_dev *t7xx_dev, u32 event)
 	return ret;
 }
 
+int t7xx_pci_reprobe_early(struct t7xx_pci_dev *t7xx_dev)
+{
+	enum t7xx_mode mode = READ_ONCE(t7xx_dev->mode);
+	int ret;
+
+	if (mode == T7XX_FASTBOOT_DOWNLOAD)
+		pm_runtime_put_noidle(&t7xx_dev->pdev->dev);
+
+	ret = t7xx_send_fsm_command(t7xx_dev, FSM_CMD_STOP);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+int t7xx_pci_reprobe(struct t7xx_pci_dev *t7xx_dev, bool boot)
+{
+	int ret;
+
+	ret = t7xx_pcie_reinit(t7xx_dev, boot);
+	if (ret)
+		return ret;
+
+	t7xx_clear_rgu_irq(t7xx_dev);
+	return t7xx_send_fsm_command(t7xx_dev, FSM_CMD_START);
+}
+
 static int __t7xx_pci_pm_resume(struct pci_dev *pdev, bool state_check)
 {
 	struct t7xx_pci_dev *t7xx_dev;
@@ -507,16 +545,11 @@ static int __t7xx_pci_pm_resume(struct pci_dev *pdev, bool state_check)
 		if (prev_state == PM_RESUME_REG_STATE_L3 ||
 		    (prev_state == PM_RESUME_REG_STATE_INIT &&
 		     atr_reg_val == ATR_SRC_ADDR_INVALID)) {
-			ret = t7xx_send_fsm_command(t7xx_dev, FSM_CMD_STOP);
-			if (ret)
-				return ret;
-
-			ret = t7xx_pcie_reinit(t7xx_dev, true);
+			ret = t7xx_pci_reprobe_early(t7xx_dev);
 			if (ret)
 				return ret;
 
-			t7xx_clear_rgu_irq(t7xx_dev);
-			return t7xx_send_fsm_command(t7xx_dev, FSM_CMD_START);
+			return t7xx_pci_reprobe(t7xx_dev, true);
 		}
 
 		if (prev_state == PM_RESUME_REG_STATE_EXP ||