linux-kernel - RE: [PATCH 1/2] Revert "xhci 1.0: Limit arbitrarily-aligned scatter gather."

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Message-ID: <Pine.LNX.4.44L0.1403071043020.1246-100000@iolanthe.rowland.org>
Date:	Fri, 7 Mar 2014 10:44:00 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	David Laight <David.Laight@...LAB.COM>
cc:	'Mathias Nyman' <mathias.nyman@...ux.intel.com>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"sarah.a.sharp@...ux.intel.com" <sarah.a.sharp@...ux.intel.com>,
	stable <stable@...r.kernel.org>
Subject: RE: [PATCH 1/2] Revert "xhci 1.0: Limit arbitrarily-aligned scatter
 gather."

On Fri, 7 Mar 2014, David Laight wrote:

> From: Mathias Nyman
> > This reverts commit 247bf557273dd775505fb9240d2d152f4f20d304.
> 
> You need to revert further.
> Just don’t set hcd->self.no_sg_constraint ever - since it just
> doesn't work.

No; it does work most of the time.

If hcd->self.no_sg_constraint wasn't sent, then certain commands would 
fail always, instead of failing occasionally.

Alan Stern

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