diff options
Diffstat (limited to 'drivers/spi/spi-bcm2835.c')
| -rw-r--r-- | drivers/spi/spi-bcm2835.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/spi/spi-bcm2835.c b/drivers/spi/spi-bcm2835.c index 6ab43c8bd6fd..ac1760e06a86 100644 --- a/drivers/spi/spi-bcm2835.c +++ b/drivers/spi/spi-bcm2835.c @@ -20,6 +20,7 @@ * GNU General Public License for more details. */ +#include <asm/page.h> #include <linux/clk.h> #include <linux/completion.h> #include <linux/delay.h> @@ -378,18 +379,19 @@ static bool bcm2835_spi_can_dma(struct spi_master *master, } /* if we run rx/tx_buf with word aligned addresses then we are OK */ - if (((u32)tfr->tx_buf % 4 == 0) && ((u32)tfr->tx_buf % 4 == 0)) + if ((((size_t)tfr->rx_buf & 3) == 0) && + (((size_t)tfr->tx_buf & 3) == 0)) return true; /* otherwise we only allow transfers within the same page * to avoid wasting time on dma_mapping when it is not practical */ - if (((u32)tfr->tx_buf % SZ_4K) + tfr->len > SZ_4K) { + if (((size_t)tfr->tx_buf & PAGE_MASK) + tfr->len > PAGE_SIZE) { dev_warn_once(&spi->dev, "Unaligned spi tx-transfer bridging page\n"); return false; } - if (((u32)tfr->rx_buf % SZ_4K) + tfr->len > SZ_4K) { + if (((size_t)tfr->rx_buf & PAGE_MASK) + tfr->len > PAGE_SIZE) { dev_warn_once(&spi->dev, "Unaligned spi tx-transfer bridging page\n"); return false; |