tree a61cd2a3e8925e0a60e6fb21a973154a9c63d45b
parent a04ac5b9b45a7adec7d3ee3968e677b6e4b98f25
author Wolfgang Muees <wolfgang.mues@auerswald.de> 1267825420 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1267903601 -0800

mmc: at91_mci: use one coherent DMA buffer

The TX DMA buffer is allocated only once, because the
allocation/deallocation of the buffer for EACH chunk of data is
time-consuming and prone to memory fragmentation.

Using a coherent DMA buffer avoids extra data cache calls.

[nicolas.ferre@atmel.com: coding style modifications]
Signed-off-by: Wolfgang Muees <wolfgang.mues@auerswald.de>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Andrew Victor <avictor.za@gmail.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>