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Subject[PATCH 3/4] power: reset: at91-poweroff: check shdwc data structure at the beginning of probe
Date
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@microchip.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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