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| author | Javier Martinez Canillas <javier.martinez@collabora.co.uk> | 2015-02-12 14:58:28 +0100 |
|---|---|---|
| committer | Michael Turquette <mturquette@linaro.org> | 2015-02-18 18:40:01 +0100 |
| commit | 9e0ad7d28ace92319f5aa0e314ac9f11e18b4250 (patch) | |
| tree | a0cbc1685f5e35f226c2e2b247c1239c665de2ac /drivers/clk | |
| parent | MIPS: Alchemy: Remove bogus args from alchemy_clk_fgcs_detr (diff) | |
| download | linux-9e0ad7d28ace92319f5aa0e314ac9f11e18b4250.tar.xz linux-9e0ad7d28ace92319f5aa0e314ac9f11e18b4250.zip | |
clk: Don't dereference parent clock if is NULL
The clock passed as an argument to clk_mux_determine_rate_flags()
has the CLK_SET_RATE_PARENT flag set but it has no parent, then a
NULL pointer will tried to be dereferenced.
This shouldn't happen since setting that flag for a clock with no
parent is a bug but the core should be robust to handle that case.
Fixes: 035a61c314eb3 ("clk: Make clk API return per-user struct clk instances")
Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
Diffstat (limited to 'drivers/clk')
| -rw-r--r-- | drivers/clk/clk.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index 5469d7714f5d..f3a7a4425242 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -800,8 +800,8 @@ clk_mux_determine_rate_flags(struct clk_hw *hw, unsigned long rate, if (core->flags & CLK_SET_RATE_NO_REPARENT) { parent = core->parent; if (core->flags & CLK_SET_RATE_PARENT) - best = __clk_determine_rate(parent->hw, rate, - min_rate, max_rate); + best = __clk_determine_rate(parent ? parent->hw : NULL, + rate, min_rate, max_rate); else if (parent) best = clk_core_get_rate_nolock(parent); else |