diff options
| author | Huang Shijie <shijie8@gmail.com> | 2013-12-20 20:02:27 +0400 |
|---|---|---|
| committer | Brian Norris <computersforpeace@gmail.com> | 2014-01-12 00:20:06 +0400 |
| commit | a5900554a8b5fbc4fb731c6f9896ed265683f94e (patch) | |
| tree | 7d4eaf624ac4d10d1a1d3e1e094f9df3d2d863d3 /drivers | |
| parent | 2fec386a94bbe8a02d0669d9fcb32e6a69918d9f (diff) | |
| download | linux-a5900554a8b5fbc4fb731c6f9896ed265683f94e.tar.xz | |
mtd: mxc-nand: kill the NAND_MAX_PAGESIZE/NAND_MAX_OOBSIZE
We kill the NAND_MAX_PAGESIZE/NAND_MAX_OOBSIZE by the following way:
1.) Before we call the nand_scan_ident, we allocate a temporary buffer
whose size is PAGE_SIZE.
2.) After we finish the nand_scan_ident, we have already getten the
page size and oob size. We will allocate the right buffer size
again.
Signed-off-by: Huang Shijie <shijie8@gmail.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mtd/nand/mxc_nand.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c index 567a5e56660c..e9a4835c4dd9 100644 --- a/drivers/mtd/nand/mxc_nand.c +++ b/drivers/mtd/nand/mxc_nand.c @@ -1399,12 +1399,15 @@ static int mxcnd_probe(struct platform_device *pdev) int err = 0; /* Allocate memory for MTD device structure and private data */ - host = devm_kzalloc(&pdev->dev, sizeof(struct mxc_nand_host) + - NAND_MAX_PAGESIZE + NAND_MAX_OOBSIZE, GFP_KERNEL); + host = devm_kzalloc(&pdev->dev, sizeof(struct mxc_nand_host), + GFP_KERNEL); if (!host) return -ENOMEM; - host->data_buf = (uint8_t *)(host + 1); + /* allocate a temporary buffer for the nand_scan_ident() */ + host->data_buf = devm_kzalloc(&pdev->dev, PAGE_SIZE, GFP_KERNEL); + if (!host->data_buf) + return -ENOMEM; host->dev = &pdev->dev; /* structures must be linked */ @@ -1532,6 +1535,15 @@ static int mxcnd_probe(struct platform_device *pdev) goto escan; } + /* allocate the right size buffer now */ + devm_kfree(&pdev->dev, (void *)host->data_buf); + host->data_buf = devm_kzalloc(&pdev->dev, mtd->writesize + mtd->oobsize, + GFP_KERNEL); + if (!host->data_buf) { + err = -ENOMEM; + goto escan; + } + /* Call preset again, with correct writesize this time */ host->devtype_data->preset(mtd); |