Commit 82d8a344 authored Aug 30, 2018 by Claudiu Beznea Committed by Greg Kroah-Hartman Nov 20, 2019

power: reset: at91-poweroff: do not procede if at91_shdwc is allocated



[ Upstream commit 9f1e44774be578fb92776add95f1fcaf8284d692 ]

There should be only one instance of struct shdwc in the system. This is
referenced through at91_shdwc. Return in probe if at91_shdwc is already
allocated.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent 1fb3d279

drivers/power/reset/at91-sama5d2_shdwc.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -246,6 +246,9 @@ static int __init at91_shdwc_probe(struct platform_device *pdev)
		if (!pdev->dev.of_node)
		return -ENODEV;

		if (at91_shdwc)
		return -EBUSY;

		at91_shdwc = devm_kzalloc(&pdev->dev, sizeof(*at91_shdwc), GFP_KERNEL);
		if (!at91_shdwc)
		return -ENOMEM;