From 9f1e44774be578fb92776add95f1fcaf8284d692 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 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 --- 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 ad6e279..2b686c5 100644 --- a/drivers/power/reset/at91-sama5d2_shdwc.c +++ b/drivers/power/reset/at91-sama5d2_shdwc.c @@ -255,6 +255,9 @@ 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; -- 2.7.4