commit 2e9fb9953df91ef6310da22182ca8f4496907502
author Rusty Russell <rusty@rustcorp.com.au> Wed Aug 11 23:04:10 2010 -0600
committer Rusty Russell <rusty@rustcorp.com.au> Wed Aug 11 23:04:11 2010 +0930
tree 096a7b4c2cff57e6fb520f1abdc740260c57471f
parent d2800800d795350435936b08afb402ed9aab1e66

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

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>