diff options
Diffstat (limited to 'drivers/dma/tegra20-apb-dma.c')
| -rw-r--r-- | drivers/dma/tegra20-apb-dma.c | 25 |
1 files changed, 11 insertions, 14 deletions
diff --git a/drivers/dma/tegra20-apb-dma.c b/drivers/dma/tegra20-apb-dma.c index cf462b1abc0b..79e9593815f1 100644 --- a/drivers/dma/tegra20-apb-dma.c +++ b/drivers/dma/tegra20-apb-dma.c @@ -1,19 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * DMA driver for Nvidia's Tegra20 APB DMA controller. * * Copyright (c) 2012-2013, NVIDIA CORPORATION. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include <linux/bitops.h> @@ -988,8 +977,12 @@ static struct dma_async_tx_descriptor *tegra_dma_prep_slave_sg( csr |= tdc->slave_id << TEGRA_APBDMA_CSR_REQ_SEL_SHIFT; } - if (flags & DMA_PREP_INTERRUPT) + if (flags & DMA_PREP_INTERRUPT) { csr |= TEGRA_APBDMA_CSR_IE_EOC; + } else { + WARN_ON_ONCE(1); + return NULL; + } apb_seq |= TEGRA_APBDMA_APBSEQ_WRAP_WORD_1; @@ -1131,8 +1124,12 @@ static struct dma_async_tx_descriptor *tegra_dma_prep_dma_cyclic( csr |= tdc->slave_id << TEGRA_APBDMA_CSR_REQ_SEL_SHIFT; } - if (flags & DMA_PREP_INTERRUPT) + if (flags & DMA_PREP_INTERRUPT) { csr |= TEGRA_APBDMA_CSR_IE_EOC; + } else { + WARN_ON_ONCE(1); + return NULL; + } apb_seq |= TEGRA_APBDMA_APBSEQ_WRAP_WORD_1; |