netdev - Re: [PATCH 2/4] USB: XHCI: mark no_sg

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 01 Aug 2013 10:15:51 +0200
From:	Oliver Neukum <oneukum@...e.de>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Sarah Sharp <sarah.a.sharp@...ux.intel.com>,
	Ming Lei <ming.lei@...onical.com>,
	"David S. Miller" <davem@...emloft.net>,
	Freddy Xin <freddy@...x.com.tw>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Ben Hutchings <bhutchings@...arflare.com>,
	Grant Grundler <grundler@...gle.com>, netdev@...r.kernel.org,
	linux-usb@...r.kernel.org
Subject: Re: [PATCH 2/4] USB: XHCI: mark no_sg_limit

On Thu, 2013-08-01 at 15:30 +0800, Greg Kroah-Hartman wrote:
> On Wed, Jul 31, 2013 at 09:40:26AM -0700, Sarah Sharp wrote:
> > On Wed, Jul 31, 2013 at 06:51:47PM +0800, Ming Lei wrote:
> > > This patch marks all xHCI controllers as no_sg_limit since
> > > xHCI supports building packet from discontinuous buffers.
> > > 
> > > Cc: Sarah Sharp <sarah.a.sharp@...ux.intel.com>
> > > Signed-off-by: Ming Lei <ming.lei@...onical.com>
> > 
> > Acked-by: Sarah Sharp <sarah.a.sharp@...ux.intel.com>
> 
> Is it a requirement that all xhci controllers support sg?  I know we are
> starting to see other controllers (the platform code?) so would they
> need to support this as well?

The way XHCI describes transfers allows them to be arbitrary.

	Regards
		Oliver


--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html