diff options
| -rw-r--r-- | drivers/dma/tegra186-gpc-dma.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/dma/tegra186-gpc-dma.c b/drivers/dma/tegra186-gpc-dma.c index c364c278a8b0..64cedef1050a 100644 --- a/drivers/dma/tegra186-gpc-dma.c +++ b/drivers/dma/tegra186-gpc-dma.c @@ -835,6 +835,13 @@ static unsigned int get_burst_size(struct tegra_dma_channel *tdc, * len to calculate the optimum burst size */ burst_byte = burst_size ? burst_size * slave_bw : len; + + /* + * Find the largest burst size that evenly divides the transfer length. + * The hardware requires the transfer length to be a multiple of the + * burst size - partial bursts are not supported. + */ + burst_byte = min(burst_byte, 1U << __ffs(len)); burst_mmio_width = burst_byte / 4; if (burst_mmio_width < TEGRA_GPCDMA_MMIOSEQ_BURST_MIN) |