Re: Patch "usb: host: ehci-platform: fix usb 1.1 device is not connected in system resume" has been added to the 4.11-stable tree

[Greg KH <gregkh@linuxfoundation.org>]

Oops, nope, I had to drop this from the stable queues, as it breaks the
build.  Can you provide a backport if you think it is necessary for the
stable kernels?

thanks,

greg k-h


On Tue, May 23, 2017 at 02:40:42PM +0200, gregkh@linuxfoundation.org wrote:
> 
> This is a note to let you know that I've just added the patch titled
> 
>     usb: host: ehci-platform: fix usb 1.1 device is not connected in system resume
> 
> to the 4.11-stable tree which can be found at:
>     http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
> 
> The filename of the patch is:
>      usb-host-ehci-platform-fix-usb-1.1-device-is-not-connected-in-system-resume.patch
> and it can be found in the queue-4.11 subdirectory.
> 
> If you, or anyone else, feels it should not be added to the stable tree,
> please let <stable@vger.kernel.org> know about it.
> 
> 
> >From d4d75128b8fd727d42c775a16b41634d09409dba Mon Sep 17 00:00:00 2001
> From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
> Date: Tue, 21 Feb 2017 19:59:48 +0900
> Subject: usb: host: ehci-platform: fix usb 1.1 device is not connected in system resume
> 
> From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
> 
> commit d4d75128b8fd727d42c775a16b41634d09409dba upstream.
> 
> This patch fixes an issue that a usb 1.1 device is not connected in
> system resume and then the following message appeared if debug messages
> are enabled:
> 	usb 2-1: Waited 2000ms for CONNECT
> 
> To resolve this issue, the EHCI controller must be resumed after its
> companion controllers. So, this patch adds such code on the driver.
> 
> Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> 
> ---
>  drivers/usb/host/ehci-platform.c |    7 +++++++
>  1 file changed, 7 insertions(+)
> 
> --- a/drivers/usb/host/ehci-platform.c
> +++ b/drivers/usb/host/ehci-platform.c
> @@ -34,6 +34,7 @@
>  #include <linux/usb.h>
>  #include <linux/usb/hcd.h>
>  #include <linux/usb/ehci_pdriver.h>
> +#include <linux/usb/of.h>
>  
>  #include "ehci.h"
>  
> @@ -297,6 +298,7 @@ static int ehci_platform_probe(struct pl
>  		goto err_power;
>  
>  	device_wakeup_enable(hcd->self.controller);
> +	device_enable_async_suspend(hcd->self.controller);
>  	platform_set_drvdata(dev, hcd);
>  
>  	return err;
> @@ -370,6 +372,7 @@ static int ehci_platform_resume(struct d
>  	struct usb_ehci_pdata *pdata = dev_get_platdata(dev);
>  	struct platform_device *pdev = to_platform_device(dev);
>  	struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
> +	struct device *companion_dev;
>  
>  	if (pdata->power_on) {
>  		int err = pdata->power_on(pdev);
> @@ -377,6 +380,10 @@ static int ehci_platform_resume(struct d
>  			return err;
>  	}
>  
> +	companion_dev = usb_of_get_companion_dev(hcd->self.controller);
> +	if (companion_dev)
> +		device_pm_wait_for_dev(hcd->self.controller, companion_dev);
> +
>  	ehci_resume(hcd, priv->reset_on_resume);
>  	return 0;
>  }
> 
> 
> Patches currently in stable-queue which might be from yoshihiro.shimoda.uh@renesas.com are
> 
> queue-4.11/usb-host-ehci-platform-fix-usb-1.1-device-is-not-connected-in-system-resume.patch
> queue-4.11/usb-ehci-platform-fix-companion-device-leak.patch