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USB: dwc2: shut down wakeup timer before freeing HCD state

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dwc2_wakeup_detected() accesses the DWC2 host state and can rearm the
wakeup timer.  dwc2_hcd_free() currently deletes the timer only after
freeing host-owned state, and timer_delete() does not synchronize a
callback or prevent it from being queued again.

Stop and shut down the timer in dwc2_hcd_release(), before the HCD
resources are freed.  This covers both the HCD initialization error path
and normal HCD removal.

Fixes: 7359d482eb ("staging: HCD files for the DWC2 driver")
Cc: stable <stable@kernel.org>
Assisted-by: Codex:GPT-5
Signed-off-by: Runyu Xiao <runyu.xiao@seu.edu.cn>
Reviewed-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://patch.msgid.link/20260904065323.4047026-1-runyu.xiao@seu.edu.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Runyu Xiao 2026-09-04 14:53:23 +08:00 committed by Greg Kroah-Hartman
parent 3d9bbf0ffe
commit fd772af951
1 changed files with 1 additions and 2 deletions
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3
drivers/usb/dwc2/hcd.c
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@ -5082,14 +5082,13 @@ static void dwc2_hcd_free(struct dwc2_hsotg *hsotg)
}
cancel_work_sync(&hsotg->phy_reset_work);
timer_delete(&hsotg->wkp_timer);
}
static void dwc2_hcd_release(struct dwc2_hsotg *hsotg)
{
/* Turn off all host-specific interrupts */
dwc2_disable_host_interrupts(hsotg);
timer_shutdown_sync(&hsotg->wkp_timer);
dwc2_hcd_free(hsotg);
}