Messages in this thread Patch in this message | | | From | Nicolas Ferre <> | Subject | [PATCH 1/3 v2] MTD: atmel_nand: modify test case for using DMA operations | Date | Fri, 1 Apr 2011 16:40:44 +0200 |
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We have better performances not using DMA for oob operations. Modify size test so that it is using DMA for size greater than oobsize.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> --- Artem,
Here is the v2 version with embedded comment as you suggested.
Best regards,
drivers/mtd/nand/atmel_nand.c | 6 ++++-- 1 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c index 6fae04b..5872f2a 100644 --- a/drivers/mtd/nand/atmel_nand.c +++ b/drivers/mtd/nand/atmel_nand.c @@ -280,7 +280,8 @@ static void atmel_read_buf(struct mtd_info *mtd, u8 *buf, int len) struct nand_chip *chip = mtd->priv; struct atmel_nand_host *host = chip->priv; - if (use_dma && len >= mtd->oobsize) + if (use_dma && len > mtd->oobsize) + /* only use DMA for bigger than oob size: better performances */ if (atmel_nand_dma_op(mtd, buf, len, 1) == 0) return; @@ -295,7 +296,8 @@ static void atmel_write_buf(struct mtd_info *mtd, const u8 *buf, int len) struct nand_chip *chip = mtd->priv; struct atmel_nand_host *host = chip->priv; - if (use_dma && len >= mtd->oobsize) + if (use_dma && len > mtd->oobsize) + /* only use DMA for bigger than oob size: better performances */ if (atmel_nand_dma_op(mtd, (void *)buf, len, 0) == 0) return; -- 1.7.3
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