linux-kernel - [PATCH 16/21] platform: goldfish: pipe: Call misc

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Message-Id: <20180914175122.21036-16-rkir@google.com>
Date:   Fri, 14 Sep 2018 10:51:17 -0700
From:   rkir@...gle.com
To:     gregkh@...uxfoundation.org
Cc:     tkjos@...gle.com, linux-kernel@...r.kernel.org,
        Roman Kiryanov <rkir@...gle.com>
Subject: [PATCH 16/21] platform: goldfish: pipe: Call misc_deregister if init fails

From: Roman Kiryanov <rkir@...gle.com>

Undo effects of misc_register if driver's init fails after
misc_register.

Signed-off-by: Roman Kiryanov <rkir@...gle.com>
---
 drivers/platform/goldfish/goldfish_pipe_v2.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/goldfish/goldfish_pipe_v2.c b/drivers/platform/goldfish/goldfish_pipe_v2.c
index 9fa5136be909..e3358c682562 100644
--- a/drivers/platform/goldfish/goldfish_pipe_v2.c
+++ b/drivers/platform/goldfish/goldfish_pipe_v2.c
@@ -1159,8 +1159,10 @@ int goldfish_pipe_device_v2_init(struct platform_device *pdev,
 	dev->pipes_capacity = INITIAL_PIPES_CAPACITY;
 	dev->pipes = kcalloc(dev->pipes_capacity, sizeof(*dev->pipes),
 			     GFP_KERNEL);
-	if (!dev->pipes)
+	if (!dev->pipes) {
+		misc_deregister(&dev->miscdev);
 		return -ENOMEM;
+	}
 
 	/*
 	 * We're going to pass two buffers, open_command_params and
@@ -1173,6 +1175,7 @@ int goldfish_pipe_device_v2_init(struct platform_device *pdev,
 		__get_free_page(GFP_KERNEL);
 	if (!dev->buffers) {
 		kfree(dev->pipes);
+		misc_deregister(&dev->miscdev);
 		return -ENOMEM;
 	}
 
-- 
2.19.0.397.gdd90340f6a-goog