[U-Boot] [PATCH v5 4/9] nand: Extend nand_(read|write)_skip_bad with *actual and limit parameters

[Scott Wood <scottwood@freescale.com>]

On 03/08/2013 11:37:23 AM, Tom Rini wrote:
> 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>
> ---
> Changes in v5: None
> Changes in v4:
> - Further reword nand_util.c comments, from Scott
> - In nand_write_skip_bad make sure *actual is 0 for YAFFS2 errors too,
>   reminded by Scott.
> - In cmd_nand.c don't drop the size is less than maxsize check in
>   arg_off_size as other nand functions need this still (Scott).
> 
> Changes in v3:
> - Reworked skip_check_len changes to just add accounting for *used to
>   the logic.
> - Allow for actual to be NULL in nand_(read|write)_skip_bad, only DFU
>   calls this with a non-NULL parameter.  Make sure the comments for  
> both
>   functions explain the parameters and their behavior.
> - Other style changes requested by Scott.
> - As nand_(write|read)_skip_bad passes back just a used length now.
> 
> Changes in v2:
> - NAND skip_check_len changes reworked to allow
>   nand_(read|write)_skip_bad to return this information to the caller.
> 
>  common/cmd_nand.c            |   53 ++++++++++++++++++--------------
>  common/env_nand.c            |    3 +-
>  drivers/mtd/nand/nand_util.c |   68  
> +++++++++++++++++++++++++++++++++++++-----
>  include/nand.h               |    4 +--
>  4 files changed, 95 insertions(+), 33 deletions(-)

Acked-by: Scott Wood <scottwood@freescale.com>

-Scott