From: Rusty Russell <rusty@rustcorp.com.au>
Date: Thu, 12 Aug 2010 05:04:10 +0000 (-0600)
Subject: params: don't hand NULL values to param.set callbacks.
X-Git-Tag: v2.6.36-rc1~57^2~20
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2e9fb9953df91ef6310da22182ca8f4496907502;p=pandora-kernel.git

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>
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