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 <sba...@denx.de>
CC: Fabio Estevam <fabio.este...@freescale.com>
Cc: Scott Wood <scottw...@freescale.com>
Cc: Marek Vasut <ma...@denx.de>
Signed-off-by: Peng Fan <van.free...@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;
}
/*!
--
2.6.2
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