| Message ID | 5796146a77035a0dadefd2fb430e87156c6c2114.1312887860.git.viresh.kumar@st.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/drivers/spi/spi-pl022.c b/drivers/spi/spi-pl022.c index cbd9afe..452952b 100644 --- a/drivers/spi/spi-pl022.c +++ b/drivers/spi/spi-pl022.c @@ -1016,7 +1016,8 @@ 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 = ((pl022->cur_transfer->len + (1 << PAGE_SHIFT) - 1) + >> PAGE_SHIFT); dev_dbg(&pl022->adev->dev, "using %d pages for transfer\n", pages); ret = sg_alloc_table(&pl022->sgt_rx, pages, GFP_NOWAIT);
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> --- drivers/spi/spi-pl022.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-)