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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 <stefan.agner@toradex.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Stefan Agner 2017-08-23 09:46:17 -07:00 committed by Tom Rini
parent 527d86558e
commit 5c27535dc9
1 changed files with 1 additions and 1 deletions
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2
disk/part_iso.c
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@ -24,7 +24,7 @@
#undef CHECK_FOR_POWERPC_PLATTFORM #undef CHECK_FOR_POWERPC_PLATTFORM
#define CD_SECTSIZE 2048 #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, unsigned long iso_dread(struct blk_desc *block_dev, lbaint_t start,
lbaint_t blkcnt, void *buffer) lbaint_t blkcnt, void *buffer)