[PATCH 4.17 218/336] soc/tegra: pmc: Dont allocate struct tegra_powergate on stack

From: Greg Kroah-Hartman
Date: Wed Aug 01 2018 - 14:04:54 EST


4.17-stable review patch. If anyone has any objections, please let me know.

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

From: Viresh Kumar <viresh.kumar@xxxxxxxxxx>

[ Upstream commit 495ac33a3b82f85ed4fbdd9b826c1d2fbc8e9b68 ]

With a later commit an instance of the struct device will be added to
struct genpd and with that the size of the struct tegra_powergate will
be over 1024 bytes. That generates following warning:

drivers/soc/tegra/pmc.c:579:1: warning: the frame size of 1200 bytes is larger than 1024 bytes [-Wframe-larger-than=]

Avoid such warnings by allocating the structure dynamically.

Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
Acked-by: Thierry Reding <treding@xxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/soc/tegra/pmc.c | 20 +++++++++++++-------
1 file changed, 13 insertions(+), 7 deletions(-)

--- a/drivers/soc/tegra/pmc.c
+++ b/drivers/soc/tegra/pmc.c
@@ -559,22 +559,28 @@ EXPORT_SYMBOL(tegra_powergate_remove_cla
int tegra_powergate_sequence_power_up(unsigned int id, struct clk *clk,
struct reset_control *rst)
{
- struct tegra_powergate pg;
+ struct tegra_powergate *pg;
int err;

if (!tegra_powergate_is_available(id))
return -EINVAL;

- pg.id = id;
- pg.clks = &clk;
- pg.num_clks = 1;
- pg.reset = rst;
- pg.pmc = pmc;
+ pg = kzalloc(sizeof(*pg), GFP_KERNEL);
+ if (!pg)
+ return -ENOMEM;

- err = tegra_powergate_power_up(&pg, false);
+ pg->id = id;
+ pg->clks = &clk;
+ pg->num_clks = 1;
+ pg->reset = rst;
+ pg->pmc = pmc;
+
+ err = tegra_powergate_power_up(pg, false);
if (err)
pr_err("failed to turn on partition %d: %d\n", id, err);

+ kfree(pg);
+
return err;
}
EXPORT_SYMBOL(tegra_powergate_sequence_power_up);