[PATCH] bus: mhi: host: pci_generic: Update the default autosuspend_delay_ms as 5000ms
From: Slark Xiao
Date: Mon Oct 19 2026 - 01:54:56 EST
For some MHI devices in some specific scenario, the default value
of autosuspend_delay_ms may not enough to handle last wake event.
This may lead to some unexpected problems.
Refer to the Qualcomm's Windows settings and we checked this with
Quaclomm over case, Qualcomm recommend us to set this as 5000ms.
Qualcomm also suggests us to update this for all MHI devices.
Since this setting has affected some existed kernel versions, it's
better to be applied to stable version.
Fixes: d3800c1dce24 ("bus: mhi: pci_generic: Add support for runtime PM")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Slark Xiao <slark_xiao@xxxxxxx>
---
drivers/bus/mhi/host/pci_generic.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/bus/mhi/host/pci_generic.c b/drivers/bus/mhi/host/pci_generic.c
index 7193a384cca4..40735beb46cb 100644
--- a/drivers/bus/mhi/host/pci_generic.c
+++ b/drivers/bus/mhi/host/pci_generic.c
@@ -1483,7 +1483,7 @@ static int mhi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
/* Allow runtime suspend only if both PME from D3Hot and M3 are supported */
if (pci_pme_capable(pdev, PCI_D3hot) && !(info->no_m3)) {
- pm_runtime_set_autosuspend_delay(&pdev->dev, 2000);
+ pm_runtime_set_autosuspend_delay(&pdev->dev, 5000);
pm_runtime_use_autosuspend(&pdev->dev);
pm_runtime_mark_last_busy(&pdev->dev);
pm_runtime_put_noidle(&pdev->dev);
--
2.53.0