From: Claudiu Beznea <claudiu.beznea@microchip.com>
To: <nicolas.ferre@microchip.com>, <alexandre.belloni@bootlin.com>,
<linux@armlinux.org.uk>, <sre@kernel.org>
Cc: <linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <linux-pm@vger.kernel.org>,
Claudiu Beznea <claudiu.beznea@microchip.com>
Subject: [PATCH 6/6] power: reset: at91-poweroff: do not procede if at91_shdwc is allocated
Date: Thu, 30 Aug 2018 14:50:11 +0300 [thread overview]
Message-ID: <1535629811-13403-7-git-send-email-claudiu.beznea@microchip.com> (raw)
In-Reply-To: <1535629811-13403-1-git-send-email-claudiu.beznea@microchip.com>
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@microchip.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
next prev parent reply other threads:[~2018-08-30 11:50 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-30 11:50 [PATCH 0/6] shutdown procedure verification for SAMA5D2 Claudiu Beznea
2018-08-30 11:50 ` [PATCH 1/6] power: reset: at91-poweroff: switch to slow clock before shutdown Claudiu Beznea
2018-08-30 11:50 ` [PATCH 2/6] power: reset: at91-poweroff: use only one poweroff function Claudiu Beznea
2018-08-30 11:50 ` [PATCH 3/6] power: reset: at91-poweroff: make mpddrc_base part of struct shdwc Claudiu Beznea
2018-08-30 11:50 ` [PATCH 4/6] power: reset: at91-poweroff: make sclk " Claudiu Beznea
2018-08-30 11:50 ` [PATCH 5/6] power: reset: at91-poweroff: rename at91_shdwc_base member " Claudiu Beznea
2018-08-30 11:50 ` Claudiu Beznea [this message]
2018-09-06 9:54 ` [PATCH 0/6] shutdown procedure verification for SAMA5D2 Nicolas Ferre
2018-09-16 10:43 ` Sebastian Reichel
2018-09-16 20:43 ` Sebastian Reichel
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