The patch titled
USB: force root hub resume after power loss
has been removed from the -mm tree. Its filename is
usb-force-root-hub-resume-after-power-loss.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: USB: force root hub resume after power loss
From: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
This patch(as785) forces the PM core to resume a root hub after a power
loss during system sleep. If the root hub had been suspended before the
system sleep then normally the PM core would not resume it afterward.
Without this resume, various sorts of wakeup events (like port change
events) can get lost.
Signed-off-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/usb/core/hub.c | 6 ++++++
1 files changed, 6 insertions(+)
diff -puN drivers/usb/core/hub.c~usb-force-root-hub-resume-after-power-loss drivers/usb/core/hub.c
--- a/drivers/usb/core/hub.c~usb-force-root-hub-resume-after-power-loss
+++ a/drivers/usb/core/hub.c
@@ -1063,6 +1063,12 @@ void usb_root_hub_lost_power(struct usb_
unsigned long flags;
dev_warn(&rhdev->dev, "root hub lost power or was reset\n");
+
+ /* Make sure no potential wakeup events get lost,
+ * by forcing the root hub to be resumed.
+ */
+ rhdev->dev.power.prev_state.event = PM_EVENT_ON;
+
spin_lock_irqsave(&device_state_lock, flags);
hub = hdev_to_hub(rhdev);
for (port1 = 1; port1 <= rhdev->maxchild; ++port1) {
_
Patches currently in -mm which might be from stern@xxxxxxxxxxxxxxxxxxx are
git-scsi-misc.patch
fix-gregkh-usb-usbcore-add-autosuspend-autoresume-infrastructure.patch
gregkh-usb-usbcore-add-autosuspend-autoresume-infrastructure-2.patch
block-layer-early-detection-of-medium-not-present.patch
scsi-core-and-sd-early-detection-of-medium-not-present.patch
sd-early-detection-of-medium-not-present.patch
scsi-early-detection-of-medium-not-present-updated.patch
add-section-on-function-return-values-to-codingstyle.patch
add-srcu-based-notifier-chains.patch
srcu-report-out-of-memory-errors.patch
srcu-report-out-of-memory-errors-fixlet.patch
cpufreq-make-the-transition_notifier-chain-use-srcu.patch
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