From 82d8a34470e96e192290885ffb54422b6f42700f Mon Sep 17 00:00:00 2001 From: Claudiu Beznea Date: Thu, 30 Aug 2018 14:50:11 +0300 Subject: [PATCH] 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 Acked-by: Nicolas Ferre Signed-off-by: Sebastian Reichel Signed-off-by: Sasha Levin --- drivers/power/reset/at91-sama5d2_shdwc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/power/reset/at91-sama5d2_shdwc.c b/drivers/power/reset/at91-sama5d2_shdwc.c index 0206cce328b3..d9493e893d64 100644 --- a/drivers/power/reset/at91-sama5d2_shdwc.c +++ b/drivers/power/reset/at91-sama5d2_shdwc.c @@ -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; -- GitLab