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Subject[PATCH 5.2 050/137] clk: sirf: Dont reference clk_init_data after registration
Date
From: Stephen Boyd <sboyd@kernel.org>

[ Upstream commit af55dadfbce35b4f4c6247244ce3e44b2e242b84 ]

A future patch is going to change semantics of clk_register() so that
clk_hw::init is guaranteed to be NULL after a clk is registered. Avoid
referencing this member here so that we don't run into NULL pointer
exceptions.

Cc: Guo Zeng <Guo.Zeng@csr.com>
Cc: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lkml.kernel.org/r/20190731193517.237136-6-sboyd@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/clk/sirf/clk-common.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/clk/sirf/clk-common.c b/drivers/clk/sirf/clk-common.c
index ad7951b6b285e..dcf4e25a02168 100644
--- a/drivers/clk/sirf/clk-common.c
+++ b/drivers/clk/sirf/clk-common.c
@@ -297,9 +297,10 @@ static u8 dmn_clk_get_parent(struct clk_hw *hw)
{
struct clk_dmn *clk = to_dmnclk(hw);
u32 cfg = clkc_readl(clk->regofs);
+ const char *name = clk_hw_get_name(hw);

/* parent of io domain can only be pll3 */
- if (strcmp(hw->init->name, "io") == 0)
+ if (strcmp(name, "io") == 0)
return 4;

WARN_ON((cfg & (BIT(3) - 1)) > 4);
@@ -311,9 +312,10 @@ static int dmn_clk_set_parent(struct clk_hw *hw, u8 parent)
{
struct clk_dmn *clk = to_dmnclk(hw);
u32 cfg = clkc_readl(clk->regofs);
+ const char *name = clk_hw_get_name(hw);

/* parent of io domain can only be pll3 */
- if (strcmp(hw->init->name, "io") == 0)
+ if (strcmp(name, "io") == 0)
return -EINVAL;

cfg &= ~(BIT(3) - 1);
@@ -353,7 +355,8 @@ static long dmn_clk_round_rate(struct clk_hw *hw, unsigned long rate,
{
unsigned long fin;
unsigned ratio, wait, hold;
- unsigned bits = (strcmp(hw->init->name, "mem") == 0) ? 3 : 4;
+ const char *name = clk_hw_get_name(hw);
+ unsigned bits = (strcmp(name, "mem") == 0) ? 3 : 4;

fin = *parent_rate;
ratio = fin / rate;
@@ -375,7 +378,8 @@ static int dmn_clk_set_rate(struct clk_hw *hw, unsigned long rate,
struct clk_dmn *clk = to_dmnclk(hw);
unsigned long fin;
unsigned ratio, wait, hold, reg;
- unsigned bits = (strcmp(hw->init->name, "mem") == 0) ? 3 : 4;
+ const char *name = clk_hw_get_name(hw);
+ unsigned bits = (strcmp(name, "mem") == 0) ? 3 : 4;

fin = parent_rate;
ratio = fin / rate;
--
2.20.1


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