params: don't hand NULL values to param.set callbacks.

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An audit by Dongdong Deng revealed that most driver-author-written param
calls don't handle val == NULL (which happens when parameters are specified
with no =, eg "foo" instead of "foo=1").

The only real case to use this is boolean, so handle it specially for that
case and remove a source of bugs for everyone else.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Dongdong Deng <dongdong.deng@windriver.com>
Cc: Américo Wang <xiyou.wangcong@gmail.com>

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Rusty Russell 2010-08-11 23:04:10 -06:00

parent d2800800d7

commit 2e9fb9953d

1 changed files with 3 additions and 17 deletions

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kernel/params.c

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