From 49ff5bd7d4d51a8eb05796f130e9a1a96d18f522 Mon Sep 17 00:00:00 2001 From: Ezequiel Garcia Date: Wed, 17 Apr 2013 13:38:14 -0300 Subject: [PATCH 106/203] mtd: nand: pxa3xx: Move buffer release code to its own function Create a function to release the buffer and the dma channel, thus undoing what pxa3xx_nand_init_buff() did. This commit makes the code more readable and will allow to handle non-DMA capable platforms easier. Signed-off-by: Ezequiel Garcia Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse --- drivers/mtd/nand/pxa3xx_nand.c | 26 ++++++++++++++------------ 1 file changed, 14 insertions(+), 12 deletions(-) --- a/drivers/mtd/nand/pxa3xx_nand.c +++ b/drivers/mtd/nand/pxa3xx_nand.c @@ -912,6 +912,18 @@ static int pxa3xx_nand_init_buff(struct return 0; } +static void pxa3xx_nand_free_buff(struct pxa3xx_nand_info *info) +{ + struct platform_device *pdev = info->pdev; + if (use_dma) { + pxa_free_dma(info->data_dma_ch); + dma_free_coherent(&pdev->dev, MAX_BUFF_SIZE, + info->data_buff, info->data_buff_phys); + } else { + kfree(info->data_buff); + } +} + static int pxa3xx_nand_sensing(struct pxa3xx_nand_info *info) { struct mtd_info *mtd; @@ -1137,12 +1149,7 @@ static int alloc_nand_resource(struct pl fail_free_buf: free_irq(irq, info); - if (use_dma) { - pxa_free_dma(info->data_dma_ch); - dma_free_coherent(&pdev->dev, MAX_BUFF_SIZE, - info->data_buff, info->data_buff_phys); - } else - kfree(info->data_buff); + pxa3xx_nand_free_buff(info); fail_disable_clk: clk_disable_unprepare(info->clk); return ret; @@ -1163,12 +1170,7 @@ static int pxa3xx_nand_remove(struct pla irq = platform_get_irq(pdev, 0); if (irq >= 0) free_irq(irq, info); - if (use_dma) { - pxa_free_dma(info->data_dma_ch); - dma_free_writecombine(&pdev->dev, MAX_BUFF_SIZE, - info->data_buff, info->data_buff_phys); - } else - kfree(info->data_buff); + pxa3xx_nand_free_buff(info); clk_disable_unprepare(info->clk);