From 4a610fada193057c97c1b23016ef119f98459b22 Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Thu, 19 Jul 2018 10:13:23 +0900 Subject: [PATCH] mtd: nand: denali: correct buffer alignment for DMA transfer The NAND framework makes sure to pass in the buffer with at least chip->buf_align alignment. Currently, the Denali NAND driver only requests 16 byte alignment. This causes unaligned cache operations for the DMA transfer. [Error Example] => nand read 81000010 0 1000 NAND read: device 0 offset 0x0, size 0x1000 CACHE: Misaligned operation at range [81000010, 81001010] CACHE: Misaligned operation at range [81000010, 81001010] CACHE: Misaligned operation at range [81000010, 81001010] CACHE: Misaligned operation at range [81000010, 81001010] 4096 bytes read: OK Reported-by: Marek Vasut Signed-off-by: Masahiro Yamada --- drivers/mtd/nand/denali.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mtd/nand/denali.c b/drivers/mtd/nand/denali.c index 6266c8aa92..7302c37003 100644 --- a/drivers/mtd/nand/denali.c +++ b/drivers/mtd/nand/denali.c @@ -1270,7 +1270,7 @@ int denali_init(struct denali_nand_info *denali) denali->dma_avail = 1; if (denali->dma_avail) { - chip->buf_align = 16; + chip->buf_align = ARCH_DMA_MINALIGN; if (denali->caps & DENALI_CAP_DMA_64BIT) denali->setup_dma = denali_setup_dma64; else -- 2.39.5