From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
To: dmitry.torokhov@gmail.com, rydberg@euromail.se, tj@kernel.org
Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org,
kernel-janitors@vger.kernel.org,
Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Subject: [PATCH] Input: Fix a ref counting issue
Date: Sun, 29 Nov 2020 09:45:16 +0100 [thread overview]
Message-ID: <20201129084516.1456099-1-christophe.jaillet@wanadoo.fr> (raw)
In case of a managed resource, 'devm_input_device_release()' already has a
'input_put_device(dev)' call.
Avoid a double reference decrement by explicitly calling
'input_put_device()' only on non-managed input device.
Fixes: 2be975c6d920 ("Input: introduce managed input devices (add devres support)")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
This patch is completely speculative and compile tested only.
---
drivers/input/input.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/input/input.c b/drivers/input/input.c
index 3cfd2c18eebd..c09c9f020667 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -1920,7 +1920,8 @@ void input_free_device(struct input_dev *dev)
devm_input_device_release,
devm_input_device_match,
dev));
- input_put_device(dev);
+ else
+ input_put_device(dev);
}
}
EXPORT_SYMBOL(input_free_device);
--
2.27.0
next reply other threads:[~2020-11-29 8:47 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-29 8:45 Christophe JAILLET [this message]
2020-11-29 19:49 ` [PATCH] Input: Fix a ref counting issue Dmitry Torokhov
2020-11-29 20:14 ` Christophe JAILLET
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