mtd: nand: Error out if cmd_ctrl() is missing

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If no user specified chip->select_chip() function is provided, code in
nand_base.c will automatically set this hook to nand_select_chip(),
which in turn depends on chip->cmd_ctrl() hook being valid. Not
providing both of those functions in NAND controller driver (for example
by mistake) will result in a bit cryptic segfault. Same is true for
chip->cmdfunc().

To avoid the above scenario add a check in nand_scan_dent and error out
if cmd_ctrl() is not provided.

Suggested-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Suggested-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>

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Andrey Smirnov 2016-07-21 14:59:20 -07:00 • committed by Boris Brezillon

parent 75c19e58ab

commit 76fe334f71

1 changed files with 9 additions and 0 deletions

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drivers/mtd/nand/nand_base.c

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