linux-kernel - Re: [PATCH] USB_EHCI_TT_NEWSCHED in *86 defconfig

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Date:	Fri, 2 Jan 2015 12:27:10 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Valdis Kletnieks <Valdis.Kletnieks@...edu>
cc:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, <x86@...nel.org>,
	<linux-kernel@...r.kernel.org>, <robtongue@...il.com>
Subject: Re: [PATCH] USB_EHCI_TT_NEWSCHED in *86 defconfig

On Fri, 2 Jan 2015, Valdis Kletnieks wrote:

> Some Gentoo users are encountering problems because USB_EHCI_TT_NEWSCHED isn't
> set in the defconfig (and Gentoo differs from other distros in not providing a
> distro .config).  Alan Stern has said there's no reason to not set it, and the
> ability to turn it off at all should probably be yanked.
> 
> http://article.gmane.org/gmane.linux.usb.general/119920
> 
> This addresses issue https://bugs.gentoo.org/show_bug.cgi?id=533472
> 
> (The problem also theoretically affects the sh, arm, mips, powerpc, and
> sparc archs, but those would be other patches if this one that fixes 98% of
> the problem is accepted).
> 
> Signed-off-by: Valdis Kletnieks <valdis.kletnieks@...edu>
> 
> --- a/arch/x86/configs/i386_defconfig.dist	2014-12-19 12:38:51.467027402 -0500
> +++ b/arch/x86/configs/i386_defconfig	2015-01-02 11:03:55.817776347 -0500
> @@ -248,7 +248,7 @@ CONFIG_USB=y
>  CONFIG_USB_ANNOUNCE_NEW_DEVICES=y
>  CONFIG_USB_MON=y
>  CONFIG_USB_EHCI_HCD=y
> -# CONFIG_USB_EHCI_TT_NEWSCHED is not set
> +CONFIG_USB_EHCI_TT_NEWSCHED=y
>  CONFIG_USB_OHCI_HCD=y
>  CONFIG_USB_UHCI_HCD=y
>  CONFIG_USB_PRINTER=y
> --- a/arch/x86/configs/x86_64_defconfig.dist	2014-12-19 12:38:51.467027402 -0500
> +++ b/arch/x86/configs/x86_64_defconfig	2015-01-02 11:04:10.233816380 -0500
> @@ -243,7 +243,7 @@ CONFIG_USB=y
>  CONFIG_USB_ANNOUNCE_NEW_DEVICES=y
>  CONFIG_USB_MON=y
>  CONFIG_USB_EHCI_HCD=y
> -# CONFIG_USB_EHCI_TT_NEWSCHED is not set
> +CONFIG_USB_EHCI_TT_NEWSCHED=y
>  CONFIG_USB_OHCI_HCD=y
>  CONFIG_USB_UHCI_HCD=y
>  CONFIG_USB_PRINTER=y

Acked-by: Alan Stern <stern@...land.harvard.edu>

This should have been done years ago.  Thanks.

Alan Stern

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