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Message-ID: <1541416443-4321-4-git-send-email-claudiu.beznea@microchip.com>
Date: Mon, 5 Nov 2018 11:14:28 +0000
From: <Claudiu.Beznea@...rochip.com>
To: <sre@...nel.org>, <Nicolas.Ferre@...rochip.com>,
<alexandre.belloni@...tlin.com>
CC: <linux-pm@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <Claudiu.Beznea@...rochip.com>
Subject: [PATCH 3/4] power: reset: at91-poweroff: check shdwc data structure
at the beginning of probe
Check at91_shdwc before continuing with probe since we want only one instance of
this driver. Inspired from commit 9f1e44774be5 ("power: reset: at91-poweroff:
do not procede if at91_shdwc is allocated").
Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
---
drivers/power/reset/at91-poweroff.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/power/reset/at91-poweroff.c b/drivers/power/reset/at91-poweroff.c
index 48661e04a3de..e75d8f0f0526 100644
--- a/drivers/power/reset/at91-poweroff.c
+++ b/drivers/power/reset/at91-poweroff.c
@@ -160,6 +160,9 @@ static int __init at91_poweroff_probe(struct platform_device *pdev)
u32 ddr_type;
int ret;
+ 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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