diff options
Diffstat (limited to 'drivers/dma/bcm2835-dma.c')
| -rw-r--r-- | drivers/dma/bcm2835-dma.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/dma/bcm2835-dma.c b/drivers/dma/bcm2835-dma.c index a56fe373e8f9..6d66e233a191 100644 --- a/drivers/dma/bcm2835-dma.c +++ b/drivers/dma/bcm2835-dma.c @@ -503,8 +503,12 @@ static int bcm2835_dma_alloc_chan_resources(struct dma_chan *chan) dev_dbg(dev, "Allocating DMA channel %d\n", c->ch); + /* + * Control blocks are 256 bit in length and must start at a 256 bit + * (32 byte) aligned address (BCM2835 ARM Peripherals, sec. 4.2.1.1). + */ c->cb_pool = dma_pool_create(dev_name(dev), dev, - sizeof(struct bcm2835_dma_cb), 0, 0); + sizeof(struct bcm2835_dma_cb), 32, 0); if (!c->cb_pool) { dev_err(dev, "unable to allocate descriptor pool\n"); return -ENOMEM; |