A-Team_Digital_Solutions/android_kernel_motorola_sm6375
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clk: Add additional checking to some clock driver functions

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Fix certain functions with potential for a NULL
pointer de-reference.

Change-Id: I855ef1d883a22616db7086bd5d47ee1f8e54694a
Signed-off-by: Deepak Katragadda <dkatraga@codeaurora.org>
Signed-off-by: David Dai <daidavid1@codeaurora.org>
Signed-off-by: David Collins <collinsd@codeaurora.org>
This commit is contained in:
Deepak Katragadda 2018-09-14 11:25:38 -07:00 • committed by David Collins
commit b3394e839b
2 changed files with 4 additions and 2 deletions
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3
drivers/clk/clk-divider.c
View file

@ -295,6 +295,9 @@ static int clk_divider_bestdiv(struct clk_hw *hw, struct clk_hw *parent,
unsigned long parent_rate, best = 0, now, maxdiv;
unsigned long parent_rate_saved = *best_parent_rate;
if (!hw || !parent)
return -EINVAL;
if (!rate)
rate = 1;

3
drivers/clk/qcom/clk-rcg2.c
View file

@ -954,15 +954,14 @@ static int clk_dp_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct clk_rcg2 *rcg = to_clk_rcg2(hw);
struct clk_hw *parent = clk_hw_get_parent(hw);
struct freq_tbl f = { 0 };
unsigned long src_rate;
unsigned long num, den;
u32 mask = BIT(rcg->hid_width) - 1;
u32 hid_div, cfg;
int i, num_parents = clk_hw_get_num_parents(hw);
struct clk_hw *parent;
parent = clk_hw_get_parent(hw);
if (!parent)
return -EINVAL;