linux-kernel - [PATCH 3.2 029/101] bcma: use (get|put)_device when probing/removing device driver

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Date:   Thu, 01 Jun 2017 16:40:55 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org,
        "Rafał Miłecki" <rafal@...ecki.pl>,
        "Kalle Valo" <kvalo@...eaurora.org>
Subject: [PATCH 3.2 029/101] bcma: use (get|put)_device when
 probing/removing device driver

3.2.89-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Rafał Miłecki <rafal@...ecki.pl>

commit a971df0b9d04674e325346c17de9a895425ca5e1 upstream.

This allows tracking device state and e.g. makes devm work as expected.

Signed-off-by: Rafał Miłecki <rafal@...ecki.pl>
Signed-off-by: Kalle Valo <kvalo@...eaurora.org>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/bcma/main.c | 4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/bcma/main.c
+++ b/drivers/bcma/main.c
@@ -297,8 +297,11 @@ static int bcma_device_probe(struct devi
 					       drv);
 	int err = 0;
 
+	get_device(dev);
 	if (adrv->probe)
 		err = adrv->probe(core);
+	if (err)
+		put_device(dev);
 
 	return err;
 }
@@ -311,6 +314,7 @@ static int bcma_device_remove(struct dev
 
 	if (adrv->remove)
 		adrv->remove(core);
+	put_device(dev);
 
 	return 0;
 }