From 16d2bc5503aab2d087c1e48c888a1307a7a86270 Mon Sep 17 00:00:00 2001 From: Stefan Agner Date: Wed, 23 Aug 2017 09:37:56 -0700 Subject: disk: part: align buffer so it can be used with DMA enabled drivers When using ISO partitions with a DMA enabled block device driver reading the ISO partition leads to unaligned DMA operations: CACHE: Misaligned operation at range [bffb7da8, bffb85a8] Align the buffer to make sure we pass a buffer which works for DMA operations. Signed-off-by: Stefan Agner Acked-by: Marcel Ziswiler --- disk/part_iso.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'disk') diff --git a/disk/part_iso.c b/disk/part_iso.c index bb8ed658f2..8aef251f4e 100644 --- a/disk/part_iso.c +++ b/disk/part_iso.c @@ -24,7 +24,7 @@ #undef CHECK_FOR_POWERPC_PLATTFORM #define CD_SECTSIZE 2048 -static unsigned char tmpbuf[CD_SECTSIZE]; +static unsigned char tmpbuf[CD_SECTSIZE] __aligned(ARCH_DMA_MINALIGN); unsigned long iso_dread(struct blk_desc *block_dev, lbaint_t start, lbaint_t blkcnt, void *buffer) -- cgit v1.2.3