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-rw-r--r--drivers/spi/spi-bcm2835.c8
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;