diff options
Diffstat (limited to 'drivers/mtd/nand/nand_bbt.c')
| -rw-r--r-- | drivers/mtd/nand/nand_bbt.c | 30 |
1 files changed, 15 insertions, 15 deletions
diff --git a/drivers/mtd/nand/nand_bbt.c b/drivers/mtd/nand/nand_bbt.c index 152f3bc..74c4c9a 100644 --- a/drivers/mtd/nand/nand_bbt.c +++ b/drivers/mtd/nand/nand_bbt.c @@ -1,6 +1,4 @@ /* - * drivers/mtd/nand_bbt.c - * * Overview: * Bad block table support for the NAND driver * @@ -65,7 +63,6 @@ #include <linux/mtd/mtd.h> #include <linux/mtd/bbm.h> #include <linux/mtd/nand.h> -#include <linux/mtd/nand_ecc.h> #include <linux/bitops.h> #include <linux/string.h> @@ -718,7 +715,7 @@ static int write_bbt(struct mtd_info *mtd, uint8_t *buf, /* Must we save the block contents? */ if (td->options & NAND_BBT_SAVECONTENT) { /* Make it block aligned */ - to &= ~((loff_t)((1 << this->bbt_erase_shift) - 1)); + to &= ~(((loff_t)1 << this->bbt_erase_shift) - 1); len = 1 << this->bbt_erase_shift; res = mtd_read(mtd, to, len, &retlen, buf); if (res < 0) { @@ -1073,15 +1070,15 @@ static void verify_bbt_descr(struct mtd_info *mtd, struct nand_bbt_descr *bd) * The bad block table memory is allocated here. It must be freed by calling * the nand_free_bbt function. */ -int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd) +static int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd) { struct nand_chip *this = mtd_to_nand(mtd); - int len, res = 0; + int len, res; uint8_t *buf; struct nand_bbt_descr *td = this->bbt_td; struct nand_bbt_descr *md = this->bbt_md; - len = mtd->size >> (this->bbt_erase_shift + 2); + len = (mtd->size >> (this->bbt_erase_shift + 2)) ? : 1; /* * Allocate memory (2bit per block) and clear the memory bad block * table. @@ -1097,10 +1094,9 @@ int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd) if (!td) { if ((res = nand_memory_bbt(mtd, bd))) { pr_err("nand_bbt: can't scan flash and build the RAM-based BBT\n"); - kfree(this->bbt); - this->bbt = NULL; + goto err; } - return res; + return 0; } verify_bbt_descr(mtd, td); verify_bbt_descr(mtd, md); @@ -1110,9 +1106,8 @@ int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd) len += (len >> this->page_shift) * mtd->oobsize; buf = vmalloc(len); if (!buf) { - kfree(this->bbt); - this->bbt = NULL; - return -ENOMEM; + res = -ENOMEM; + goto err; } /* Is the bbt at a given page? */ @@ -1124,6 +1119,8 @@ int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd) } res = check_create(mtd, buf, bd); + if (res) + goto err; /* Prevent the bbt regions from erasing / writing */ mark_bbt_region(mtd, td); @@ -1131,6 +1128,11 @@ int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd) mark_bbt_region(mtd, md); vfree(buf); + return 0; + +err: + kfree(this->bbt); + this->bbt = NULL; return res; } @@ -1369,5 +1371,3 @@ int nand_markbad_bbt(struct mtd_info *mtd, loff_t offs) return ret; } - -EXPORT_SYMBOL(nand_scan_bbt); |