diff options
Diffstat (limited to 'drivers/spi/spi-topcliff-pch.c')
| -rw-r--r-- | drivers/spi/spi-topcliff-pch.c | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/drivers/spi/spi-topcliff-pch.c b/drivers/spi/spi-topcliff-pch.c index fba3f180f233..f88cbb94ce12 100644 --- a/drivers/spi/spi-topcliff-pch.c +++ b/drivers/spi/spi-topcliff-pch.c @@ -1,16 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * SPI bus driver for the Topcliff PCH used by Intel SoCs * * Copyright (C) 2011 LAPIS Semiconductor Co., Ltd. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. - * - * This program is distributed in the hope that 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. */ #include <linux/delay.h> @@ -1299,18 +1291,27 @@ static void pch_free_dma_buf(struct pch_spi_board_data *board_dat, dma->rx_buf_virt, dma->rx_buf_dma); } -static void pch_alloc_dma_buf(struct pch_spi_board_data *board_dat, +static int pch_alloc_dma_buf(struct pch_spi_board_data *board_dat, struct pch_spi_data *data) { struct pch_spi_dma_ctrl *dma; + int ret; dma = &data->dma; + ret = 0; /* Get Consistent memory for Tx DMA */ dma->tx_buf_virt = dma_alloc_coherent(&board_dat->pdev->dev, PCH_BUF_SIZE, &dma->tx_buf_dma, GFP_KERNEL); + if (!dma->tx_buf_virt) + ret = -ENOMEM; + /* Get Consistent memory for Rx DMA */ dma->rx_buf_virt = dma_alloc_coherent(&board_dat->pdev->dev, PCH_BUF_SIZE, &dma->rx_buf_dma, GFP_KERNEL); + if (!dma->rx_buf_virt) + ret = -ENOMEM; + + return ret; } static int pch_spi_pd_probe(struct platform_device *plat_dev) @@ -1387,7 +1388,9 @@ static int pch_spi_pd_probe(struct platform_device *plat_dev) if (use_dma) { dev_info(&plat_dev->dev, "Use DMA for data transfers\n"); - pch_alloc_dma_buf(board_dat, data); + ret = pch_alloc_dma_buf(board_dat, data); + if (ret) + goto err_spi_register_master; } ret = spi_register_master(master); |