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Fixes issue preventing DMA being used #204

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Fixes issue preventing DMA being used #204

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6 changes: 3 additions & 3 deletions drivers/spi/spi-bcm2835.c
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Original file line number Diff line number Diff line change
Expand Up @@ -386,14 +386,14 @@ static bool bcm2835_spi_can_dma(struct spi_master *master,
/* otherwise we only allow transfers within the same page
* to avoid wasting time on dma_mapping when it is not practical
*/
if (((size_t)tfr->tx_buf & PAGE_MASK) + tfr->len > PAGE_SIZE) {
if (((size_t)tfr->tx_buf & (PAGE_SIZE-1)) + tfr->len > PAGE_SIZE) {
dev_warn_once(&spi->dev,
"Unaligned spi tx-transfer bridging page\n");
return false;
}
if (((size_t)tfr->rx_buf & PAGE_MASK) + tfr->len > PAGE_SIZE) {
if (((size_t)tfr->rx_buf & (PAGE_SIZE-1)) + tfr->len > PAGE_SIZE) {
dev_warn_once(&spi->dev,
"Unaligned spi tx-transfer bridging page\n");
"Unaligned spi rx-transfer bridging page\n");
return false;
}

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