[NAND Question] When oob_required is used?

From	Masahiro Yamada <yamada.masahiro@socionext.com>
Newsgroups	linux.kernel
Subject	[NAND Question] When oob_required is used?
Date	2017-02-28 08:30 +0100
Message-ID	<tfKop-1dc-3@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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Hi.


I am seeing the reference implementations for the callback
in drivers/mtd/nand/nand_base.c


I see only some of them use the argument "oob_required".


- oob_required is used
nand_read_page_raw()
nand_write_page_raw()
nand_write_subpage_hwecc()


- oob_required is ignored
nand_read_page_raw_syndrome()
nand_read_page_swecc()
nand_read_page_hwecc()
nand_read_page_hwecc_oob_first()
nand_read_page_syndrome()
nand_write_page_raw_syndrome()
nand_write_page_swecc()
nand_write_page_hwecc()
nand_write_page_syndrome()



I could not get the logic
when "oob_required" is used.



When implementing drivers, the "oob_required"
should be respected (i.e. oob_poi should be transferred as well),
or is it OK to ignore it?




-- 
Best Regards
Masahiro Yamada

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[NAND Question] When oob_required is used? Masahiro Yamada <yamada.masahiro@socionext.com> - 2017-02-28 08:30 +0100
  Re: [NAND Question] When oob_required is used? Boris Brezillon <boris.brezillon@free-electrons.com> - 2017-02-28 09:20 +0100
    Re: [NAND Question] When oob_required is used? Masahiro Yamada <yamada.masahiro@socionext.com> - 2017-02-28 09:40 +0100

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