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nand: Extend nand_(read|write)_skip_bad with *actual and limit parameters

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We make these two functions take a size_t pointer to how much space
was used on NAND to read or write the buffer (when reads/writes happen)
so that bad blocks can be accounted for.  We also make them take an
loff_t limit on how much data can be read or written.  This means that
we can now catch the case of when writing to a partition would exceed
the partition size due to bad blocks.  To do this we also need to make
check_skip_len count not just complete blocks used but partial ones as
well.  All callers of nand_(read|write)_skip_bad are adjusted to call
these with the most sensible limits available.

The changes were started by Pantelis and finished by Tom.

Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com>
Signed-off-by: Tom Rini <trini@ti.com>
This commit is contained in:
Tom Rini 2013-03-14 05:32:50 +00:00 • committed by Marek Vasut
parent a24c3155db
commit c39d6a0ea5
5 changed files with 97 additions and 33 deletions
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4
include/nand.h
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@ -129,7 +129,7 @@ struct nand_erase_options {
typedef struct nand_erase_options nand_erase_options_t;
int nand_read_skip_bad(nand_info_t *nand, loff_t offset, size_t *length,
u_char *buffer);
size_t *actual, loff_t lim, u_char *buffer);
#define WITH_YAFFS_OOB (1 << 0) /* whether write with yaffs format. This flag
* is a 'mode' meaning it cannot be mixed with
@ -137,7 +137,7 @@ int nand_read_skip_bad(nand_info_t *nand, loff_t offset, size_t *length,
#define WITH_DROP_FFS (1 << 1) /* drop trailing all-0xff pages */
int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length,
u_char *buffer, int flags);
size_t *actual, loff_t lim, u_char *buffer, int flags);
int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts);
int nand_torture(nand_info_t *nand, loff_t offset);