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bcm2835-dma: only reserve channel 0 if legacy dma driver is enabled

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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 <hias@horus.com>
This commit is contained in:
Matthias Reichl
2020-10-11 00:48:55 +02:00
committed by popcornmix
parent 5a0f034e67
commit d7834fe01b
1 changed files with 2 additions and 0 deletions
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2
drivers/dma/bcm2835-dma.c
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@@ -1286,6 +1286,7 @@ static int bcm2835_dma_probe(struct platform_device *pdev)
goto err_no_dma; goto err_no_dma;
} }
#ifdef CONFIG_DMA_BCM2708
/* One channel is reserved for the legacy API */ /* One channel is reserved for the legacy API */
if (chans_available & BCM2835_DMA_BULK_MASK) { if (chans_available & BCM2835_DMA_BULK_MASK) {
rc = bcm_dmaman_probe(pdev, base, rc = bcm_dmaman_probe(pdev, base,
@@ -1296,6 +1297,7 @@ static int bcm2835_dma_probe(struct platform_device *pdev)
chans_available &= ~BCM2835_DMA_BULK_MASK; chans_available &= ~BCM2835_DMA_BULK_MASK;
} }
#endif
/* And possibly one for the 40-bit DMA memcpy API */ /* And possibly one for the 40-bit DMA memcpy API */
if (chans_available & od->cfg_data->chan_40bit_mask & if (chans_available & od->cfg_data->chan_40bit_mask &