linux-kernel - [PATCH] hwspinlock: ignore disabled device

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Date:   Thu, 7 Mar 2019 16:53:00 +0100
From:   Fabien Dessenne <fabien.dessenne@...com>
To:     Ohad Ben-Cohen <ohad@...ery.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        <linux-remoteproc@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     Fabien Dessenne <fabien.dessenne@...com>,
        Benjamin Gaignard <benjamin.gaignard@...com>
Subject: [PATCH] hwspinlock: ignore disabled device

Do not wait for hwspinlock device registration if it is not available
for use.

Signed-off-by: Fabien Dessenne <fabien.dessenne@...com>
---
 drivers/hwspinlock/hwspinlock_core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/hwspinlock/hwspinlock_core.c b/drivers/hwspinlock/hwspinlock_core.c
index 2bad40d..8d63bdc 100644
--- a/drivers/hwspinlock/hwspinlock_core.c
+++ b/drivers/hwspinlock/hwspinlock_core.c
@@ -333,6 +333,9 @@ int of_hwspin_lock_get_id(struct device_node *np, int index)
 	if (ret)
 		return ret;
 
+	if (!of_device_is_available(args.np))
+		return -ENOENT;
+
 	/* Find the hwspinlock device: we need its base_id */
 	ret = -EPROBE_DEFER;
 	rcu_read_lock();
-- 
2.7.4