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    Subject[PATCH 3.2 38/61] MIPS: AR7: allow NULL clock for clk_get_rate
    3.2.96-rc1 review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Jonas Gorski <jonas.gorski@gmail.com>

    commit 585e0e9d02a690c29932b2fc0789835c7b91d448 upstream.

    Make the behaviour of clk_get_rate consistent with common clk's
    clk_get_rate by accepting NULL clocks as parameter. Some device
    drivers rely on this, and will cause an OOPS otherwise.

    Fixes: 780019ddf02f ("MIPS: AR7: Implement clock API")
    Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
    Reported-by: Mathias Kresin <dev@kresin.me>
    Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
    Cc: James Hogan <james.hogan@imgtec.com>
    Cc: linux-mips@linux-mips.org
    Cc: linux-kernel@vger.kernel.org
    Patchwork: https://patchwork.linux-mips.org/patch/16775/
    Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
    Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
    ---
    arch/mips/ar7/clock.c | 3 +++
    1 file changed, 3 insertions(+)

    --- a/arch/mips/ar7/clock.c
    +++ b/arch/mips/ar7/clock.c
    @@ -430,6 +430,9 @@ EXPORT_SYMBOL(clk_disable);

    unsigned long clk_get_rate(struct clk *clk)
    {
    + if (!clk)
    + return 0;
    +
    return clk->rate;
    }
    EXPORT_SYMBOL(clk_get_rate);
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