[net-next v2] net: wwan: t7xx: reset device if suspend fails

[Jinjian Song]

If driver fails to set the device to suspend, it means that the
device is abnormal. In this case, reset the device to recover
when PCIe device is offline.

Signed-off-by: Jinjian Song <jinjian.song at fibocom.com>
---
V2:
 * Add judgment, reset when device is offline 
---
 drivers/net/wwan/t7xx/t7xx_pci.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/wwan/t7xx/t7xx_pci.c b/drivers/net/wwan/t7xx/t7xx_pci.c
index e556e5bd49ab..4f89a353588b 100644
--- a/drivers/net/wwan/t7xx/t7xx_pci.c
+++ b/drivers/net/wwan/t7xx/t7xx_pci.c
@@ -427,6 +427,10 @@ static int __t7xx_pci_pm_suspend(struct pci_dev *pdev)
 	iowrite32(T7XX_L1_BIT(0), IREG_BASE(t7xx_dev) + ENABLE_ASPM_LOWPWR);
 	atomic_set(&t7xx_dev->md_pm_state, MTK_PM_RESUMED);
 	t7xx_pcie_mac_set_int(t7xx_dev, SAP_RGU_INT);
+	if (pci_channel_offline(pdev)) {
+		dev_err(&pdev->dev, "Device offline, reset to recover\n");
+		t7xx_reset_device(t7xx_dev, PLDR);
+	}
 	return ret;
 }
 
-- 
2.34.1