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Date: Thu, 30 Aug 2018 14:50:11 +0300 From: Claudiu Beznea <claudiu.beznea@...rochip.com> To: <nicolas.ferre@...rochip.com>, <alexandre.belloni@...tlin.com>, <linux@...linux.org.uk>, <sre@...nel.org> CC: <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>, <linux-pm@...r.kernel.org>, Claudiu Beznea <claudiu.beznea@...rochip.com> Subject: [PATCH 6/6] 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 <claudiu.beznea@...rochip.com> --- 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 ad6e2796690a..2b686c55b717 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
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