[lkml]   [2020]   [Jun]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Patch in this message
Subject[PATCH 4.9 059/191] clk: bcm2835: Fix return type of bcm2835_register_gate
From: Nathan Chancellor <>

[ Upstream commit f376c43bec4f8ee8d1ba5c5c4cfbd6e84fb279cb ]

bcm2835_register_gate is used as a callback for the clk_register member
of bcm2835_clk_desc, which expects a struct clk_hw * return type but
bcm2835_register_gate returns a struct clk *.

This discrepancy is hidden by the fact that bcm2835_register_gate is
cast to the typedef bcm2835_clk_register by the _REGISTER macro. This
turns out to be a control flow integrity violation, which is how this
was noticed.

Change the return type of bcm2835_register_gate to be struct clk_hw *
and use clk_hw_register_gate to do so. This should be a non-functional
change as clk_register_gate calls clk_hw_register_gate anyways but this
is needed to avoid issues with further changes.

Fixes: b19f009d4510 ("clk: bcm2835: Migrate to clk_hw based registration and OF APIs")
Signed-off-by: Nathan Chancellor <>
Signed-off-by: Stephen Boyd <>
Signed-off-by: Sasha Levin <>
drivers/clk/bcm/clk-bcm2835.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/clk/bcm/clk-bcm2835.c b/drivers/clk/bcm/clk-bcm2835.c
index 73aab6e984cd7..2b5075298cdc0 100644
--- a/drivers/clk/bcm/clk-bcm2835.c
+++ b/drivers/clk/bcm/clk-bcm2835.c
@@ -1295,13 +1295,13 @@ static struct clk_hw *bcm2835_register_clock(struct bcm2835_cprman *cprman,
return &clock->hw;

-static struct clk *bcm2835_register_gate(struct bcm2835_cprman *cprman,
+static struct clk_hw *bcm2835_register_gate(struct bcm2835_cprman *cprman,
const struct bcm2835_gate_data *data)
- return clk_register_gate(cprman->dev, data->name, data->parent,
- cprman->regs + data->ctl_reg,
- CM_GATE_BIT, 0, &cprman->regs_lock);
+ return clk_hw_register_gate(cprman->dev, data->name, data->parent,
+ cprman->regs + data->ctl_reg,
+ CM_GATE_BIT, 0, &cprman->regs_lock);

typedef struct clk_hw *(*bcm2835_clk_register)(struct bcm2835_cprman *cprman,
 \ /
  Last update: 2020-06-29 22:30    [W:0.501 / U:3.836 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site