From 61b8cf0222b256b4f793d99c8bdc9b216d067a76 Mon Sep 17 00:00:00 2001 From: Clemens Ladisch Date: Sun, 8 Jan 2012 22:18:00 +0100 Subject: [PATCH 26/29] ALSA: dice: document quadlet alignment Doing accesses without quadlet alignment is a bad idea because the firmware's byte-swapping would garble the data; clarify this in the documentation. Signed-off-by: Clemens Ladisch --- sound/firewire/dice-interface.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/sound/firewire/dice-interface.h b/sound/firewire/dice-interface.h index af916b9d07a4..27b044f84c81 100644 --- a/sound/firewire/dice-interface.h +++ b/sound/firewire/dice-interface.h @@ -7,9 +7,9 @@ /* * Generally, all registers can be read like memory, i.e., with quadlet read or - * block read transactions with any alignment or length. Writes are not - * allowed except where noted; quadlet-sized registers must be written with - * a quadlet write transaction. + * block read transactions with at least quadlet-aligned offset and length. + * Writes are not allowed except where noted; quadlet-sized registers must be + * written with a quadlet write transaction. * * All values are in big endian. The DICE firmware runs on a little-endian CPU * and just byte-swaps _all_ quadlets on the bus, so values without endianness -- 1.8.3.2