From b181565ee6a0f894bd6a134b9e5bed2966bdf9b3 Mon Sep 17 00:00:00 2001 From: Viresh Kumar Date: Wed, 10 Aug 2011 17:12:11 +0530 Subject: [PATCH] spi/spi-pl022: Don't allocate more sg than required. In routine configure_dma(), if transfer->len = PAGE_SIZE, then pages is one more than required. While leads to one more sg getting allocated. This is wrong. Correct this to allocate correct number of sg. Signed-off-by: Viresh Kumar Tested-by: Linus Walleij Signed-off-by: Grant Likely --- drivers/spi/spi-pl022.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-pl022.c b/drivers/spi/spi-pl022.c index 01e9aa45ea8..248674c8a8c 100644 --- a/drivers/spi/spi-pl022.c +++ b/drivers/spi/spi-pl022.c @@ -1016,7 +1016,7 @@ static int configure_dma(struct pl022 *pl022) dmaengine_slave_config(txchan, &tx_conf); /* Create sglists for the transfers */ - pages = (pl022->cur_transfer->len >> PAGE_SHIFT) + 1; + pages = DIV_ROUND_UP(pl022->cur_transfer->len, PAGE_SIZE); dev_dbg(&pl022->adev->dev, "using %d pages for transfer\n", pages); ret = sg_alloc_table(&pl022->sgt_rx, pages, GFP_ATOMIC); -- 2.39.5