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nand: mxs: fix error handling for mxs_nand_init

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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>
Reviewed-by: Marek Vasut <marex@denx.de>
This commit is contained in:
Peng Fan 2016-01-27 10:38:02 +08:00 • committed by Scott Wood
parent 9ef2835f26
commit 549d7c0e09
1 changed files with 15 additions and 9 deletions
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24
drivers/mtd/nand/mxs_nand.c
View file

@ -1090,24 +1090,29 @@ int mxs_nand_init(struct mxs_nand_info *info)
(struct mxs_gpmi_regs *)MXS_GPMI_BASE; (struct mxs_gpmi_regs *)MXS_GPMI_BASE;
struct mxs_bch_regs *bch_regs = struct mxs_bch_regs *bch_regs =
(struct mxs_bch_regs *)MXS_BCH_BASE; (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 *) * info->desc = malloc(sizeof(struct mxs_dma_desc *) *
MXS_NAND_DMA_DESCRIPTOR_COUNT); MXS_NAND_DMA_DESCRIPTOR_COUNT);
if (!info->desc) if (!info->desc) {
ret = -ENOMEM;
goto err1; goto err1;
}
/* Allocate the DMA descriptors. */ /* Allocate the DMA descriptors. */
for (i = 0; i < MXS_NAND_DMA_DESCRIPTOR_COUNT; i++) { for (i = 0; i < MXS_NAND_DMA_DESCRIPTOR_COUNT; i++) {
info->desc[i] = mxs_dma_desc_alloc(); info->desc[i] = mxs_dma_desc_alloc();
if (!info->desc[i]) if (!info->desc[i]) {
ret = -ENOMEM;
goto err2; goto err2;
}
} }
/* Init the DMA controller. */ /* Init the DMA controller. */
for (j = MXS_DMA_CHANNEL_AHB_APBH_GPMI0; for (j = MXS_DMA_CHANNEL_AHB_APBH_GPMI0;
j <= MXS_DMA_CHANNEL_AHB_APBH_GPMI7; j++) { j <= MXS_DMA_CHANNEL_AHB_APBH_GPMI7; j++) {
if (mxs_dma_init_channel(j)) ret = mxs_dma_init_channel(j);
if (ret)
goto err3; goto err3;
} }
@ -1127,15 +1132,16 @@ int mxs_nand_init(struct mxs_nand_info *info)
return 0; return 0;
err3: err3:
for (--j; j >= 0; j--) for (--j; j >= MXS_DMA_CHANNEL_AHB_APBH_GPMI0; j--)
mxs_dma_release(j); mxs_dma_release(j);
err2: err2:
free(info->desc);
err1:
for (--i; i >= 0; i--) for (--i; i >= 0; i--)
mxs_dma_desc_free(info->desc[i]); mxs_dma_desc_free(info->desc[i]);
printf("MXS NAND: Unable to allocate DMA descriptors\n"); free(info->desc);
return -ENOMEM; err1:
if (ret == -ENOMEM)
printf("MXS NAND: Unable to allocate DMA descriptors\n");
return ret;
} }
/*! /*!