On Tue, Apr 17, 2018 at 11:32:42AM +0800, lei...@codeaurora.org wrote:
>
> xhci-plat Shutdown callback should check HCD_FLAG_HW_ACCESSIBLE
> before accessing any register. This should avoid hung with access
> controllers which support runtime suspend
>
> This can fix for issue of https://patchwork.kernel.org/patch/10339317/
> corresponding upload in CAF:
> https://source.codeaurora.org/quic/la/kernel/msm-4.4/commit/?h=LV.HB.1.1.5-03810-8x96.0&id=a7a5307ee04ad349d365ad50f304605a9cd9bd0a
>
> full patch refer attachment.
> diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
> index 9b27798..bdf914d 100644
> --- a/drivers/usb/host/xhci.c
> +++ b/drivers/usb/host/xhci.c
> @@ -702,6 +702,10 @@ static void xhci_shutdown(struct usb_hcd *hcd)
> usb_disable_xhci_ports(to_pci_dev(hcd->self.sysdev));
>
> spin_lock_irq(&xhci->lock);
> + if (!HCD_HW_ACCESSIBLE(hcd)) {
> + spin_unlock_irq(&xhci->lock);
> + return;
> + }
> xhci_halt(xhci);
> /* Workaround for spurious wakeups at shutdown with HSW */
> if (xhci->quirks & XHCI_SPURIOUS_WAKEUP)
> From 9b65acb64f1ad87d115fa147c9e947fb3d37471c Mon Sep 17 00:00:00 2001
> From: Lei wang <lei...@codeaurora.org>
> Date: Tue, 17 Apr 2018 10:55:35 +0800
> Subject: [PATCH] xhci: plat: Fix xhci_plat shutdown hung
>
> xhci-plat Shutdown callback should check HCD_FLAG_HW_ACCESSIBLE
> before accessing any register. This should avoid hung with access
> controllers which support runtime suspend
>
> Signed-off-by: Lei wang <lei...@codeaurora.org>
> ---
> drivers/usb/host/xhci.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
> index 9b27798..bdf914d 100644
> --- a/drivers/usb/host/xhci.c
> +++ b/drivers/usb/host/xhci.c
> @@ -702,6 +702,10 @@ static void xhci_shutdown(struct usb_hcd *hcd)
> usb_disable_xhci_ports(to_pci_dev(hcd->self.sysdev));
>
> spin_lock_irq(&xhci->lock);
> + if (!HCD_HW_ACCESSIBLE(hcd)) {
> + spin_unlock_irq(&xhci->lock);
> + return;
> + }
> xhci_halt(xhci);
> /* Workaround for spurious wakeups at shutdown with HSW */
> if (xhci->quirks & XHCI_SPURIOUS_WAKEUP)
> --
> 1.9.1
>
Hi,
This is the friendly patch-bot of Greg Kroah-Hartman. You have sent him
a patch that has triggered this response. He used to manually respond
to these common problems, but in order to save his sanity (he kept
writing the same thing over and over, yet to different people), I was
created. Hopefully you will not take offence and will fix the problem
in your patch and resubmit it so that it can be accepted into the Linux
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