diff options
Diffstat (limited to 'drivers/spi/spi-davinci.c')
| -rw-r--r-- | drivers/spi/spi-davinci.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/spi/spi-davinci.c b/drivers/spi/spi-davinci.c index f37bbdd18d61..595acdcfc7d0 100644 --- a/drivers/spi/spi-davinci.c +++ b/drivers/spi/spi-davinci.c @@ -660,7 +660,11 @@ static int davinci_spi_bufs(struct spi_device *spi, struct spi_transfer *t) goto err_desc; if (!t->tx_buf) { - /* use rx buffer as dummy tx buffer */ + /* To avoid errors when doing rx-only transfers with + * many SG entries (> 20), use the rx buffer as the + * dummy tx buffer so that dma reloads are done at the + * same time for rx and tx. + */ t->tx_sg.sgl = t->rx_sg.sgl; t->tx_sg.nents = t->rx_sg.nents; } |