From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Mon, 2 Mar 2015 15:45:41 +0000 (+0000)
Subject: clkdev: use clk_hw internally
X-Git-Tag: omap-for-v4.2/fixes-rc1^2~153^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d5622a9c13752be46e6fcde9d31391ce0bb0598b;p=pandora-kernel.git

clkdev: use clk_hw internally

clk_add_alias() calls clk_get() followed by clk_put() but in between
those two calls it saves away the struct clk pointer to a clk_lookup
structure. This leaves the 'clk' member of the clk_lookup pointing at
freed memory on configurations where CONFIG_COMMON_CLK=y. This is a
problem because clk_get_sys() will eventually try to dereference the
freed pointer by calling __clk_get_hw() on it. Fix this by saving away
the struct clk_hw pointer instead of the struct clk pointer so that when
we try to create a per-user struct clk in clk_get_sys() we don't
dereference a junk pointer.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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