linux-kernel - dma_sync_sg_for_cpu applied to a single scatterlist element

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <Pine.LNX.4.44L0.1003151721190.1332-100000@iolanthe.rowland.org>
Date:	Mon, 15 Mar 2010 17:30:19 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	James Bottomley <James.Bottomley@...senPartnership.com>
cc:	Kernel development list <linux-kernel@...r.kernel.org>
Subject: dma_sync_sg_for_cpu applied to a single scatterlist element

This is addressed to James Bottomley as he is the author of
Documentation/DMA-API.txt, but anyone else who can contribute is
invited to do so.

Suppose a scatter-gather transfer with multiple scatterlist elements
has been mapped via dma_map_sg().  Is it then valid to call 
dma_sync_sg_for_cpu() with the "sg" argument pointing to one of the 
mapped scatterlist elements (not necessarily the first one) and the 
"nelems" argument set to 1?

Thanks,

Alan Stern

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/