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| author | Viresh Kumar <viresh.kumar@st.com> | 2011-08-10 17:12:11 +0530 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2011-09-21 09:41:47 -0600 |
| commit | b181565ee6a0f894bd6a134b9e5bed2966bdf9b3 (patch) | |
| tree | 729ac09ecdf3fd9b16f98b5dc92b46f6f8a1b45d | |
| parent | 538a18dc189ef5d0b87c987d8460515b5e2e8588 (diff) | |
| download | linux-b181565ee6a0f894bd6a134b9e5bed2966bdf9b3.tar.gz linux-b181565ee6a0f894bd6a134b9e5bed2966bdf9b3.tar.bz2 linux-b181565ee6a0f894bd6a134b9e5bed2966bdf9b3.zip | |
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 <viresh.kumar@st.com>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| -rw-r--r-- | drivers/spi/spi-pl022.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/spi/spi-pl022.c b/drivers/spi/spi-pl022.c index 01e9aa45ea88..248674c8a8c2 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); |