From 124d503cd4c6f5a7a877226c26139ec82c7d1282 Mon Sep 17 00:00:00 2001 From: Matthias Reichl Date: Sun, 11 Oct 2020 00:48:55 +0200 Subject: [PATCH] bcm2835-dma: only reserve channel 0 if legacy dma driver is enabled If CONFIG_DMA_BCM2708 isn't enabled there's no need to mask out one of the already scarce DMA channels. Signed-off-by: Matthias Reichl --- drivers/dma/bcm2835-dma.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/dma/bcm2835-dma.c +++ b/drivers/dma/bcm2835-dma.c @@ -1283,6 +1283,7 @@ static int bcm2835_dma_probe(struct plat goto err_no_dma; } +#ifdef CONFIG_DMA_BCM2708 /* One channel is reserved for the legacy API */ if (chans_available & BCM2835_DMA_BULK_MASK) { rc = bcm_dmaman_probe(pdev, base, @@ -1293,6 +1294,7 @@ static int bcm2835_dma_probe(struct plat chans_available &= ~BCM2835_DMA_BULK_MASK; } +#endif /* And possibly one for the 40-bit DMA memcpy API */ if (chans_available & od->cfg_data->chan_40bit_mask &