Fix error handling for mxs_nand_init.

The original error handling is wrong for err2 and err1. Should first free desc[x], then free desc.

This patch also correctly handle err3, should use MXS_DMA_CHANNEL_AHB_APBH_GPMI0 as the check point.

Cc: Stefano Babic sbabic@denx.de CC: Fabio Estevam Fabio.Estevam@freescale.com Cc: Scott Wood scottwood@freescale.com Cc: Marek Vasut marex@denx.de Signed-off-by: Peng Fan van.freenix@gmail.com --- drivers/mtd/nand/mxs_nand.c | 24 +++++++++++++++--------- 1 file changed, 15 insertions(+), 9 deletions(-)

diff --git a/drivers/mtd/nand/mxs_nand.c b/drivers/mtd/nand/mxs_nand.c index ba019a0..b5bbd88 100644 --- a/drivers/mtd/nand/mxs_nand.c +++ b/drivers/mtd/nand/mxs_nand.c @@ -1090,24 +1090,29 @@ int mxs_nand_init(struct mxs_nand_info *info) (struct mxs_gpmi_regs *)MXS_GPMI_BASE; struct mxs_bch_regs *bch_regs = (struct mxs_bch_regs *)MXS_BCH_BASE; - int i = 0, j; + int i = 0, j, ret = 0;

info->desc = malloc(sizeof(struct mxs_dma_desc *) * MXS_NAND_DMA_DESCRIPTOR_COUNT); - if (!info->desc) + if (!info->desc) { + ret = -ENOMEM; goto err1; + }

/* Allocate the DMA descriptors. */ for (i = 0; i < MXS_NAND_DMA_DESCRIPTOR_COUNT; i++) { info->desc[i] = mxs_dma_desc_alloc(); - if (!info->desc[i]) + if (!info->desc[i]) { + ret = -ENOMEM; goto err2; + } }

/* Init the DMA controller. */ for (j = MXS_DMA_CHANNEL_AHB_APBH_GPMI0; j <= MXS_DMA_CHANNEL_AHB_APBH_GPMI7; j++) { - if (mxs_dma_init_channel(j)) + ret = mxs_dma_init_channel(j); + if (ret) goto err3; }

@@ -1127,15 +1132,16 @@ int mxs_nand_init(struct mxs_nand_info *info) return 0;

err3: - for (--j; j >= 0; j--) + for (--j; j >= MXS_DMA_CHANNEL_AHB_APBH_GPMI0; j--) mxs_dma_release(j); err2: - free(info->desc); -err1: for (--i; i >= 0; i--) mxs_dma_desc_free(info->desc[i]); - printf("MXS NAND: Unable to allocate DMA descriptors\n"); - return -ENOMEM; + free(info->desc); +err1: + if (ret == -ENOMEM) + printf("MXS NAND: Unable to allocate DMA descriptors\n"); + return ret; }

/*!