linux-kernel - [PATCH] virt: vbox: Add check for device_create

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Message-Id: <20220901074521.3448337-1-jiasheng@iscas.ac.cn>
Date:   Thu,  1 Sep 2022 15:45:21 +0800
From:   Jiasheng Jiang <jiasheng@...as.ac.cn>
To:     hdegoede@...hat.com, arnd@...db.de, gregkh@...uxfoundation.org
Cc:     linux-kernel@...r.kernel.org, Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: [PATCH] virt: vbox: Add check for device_create_file

As device_create_file() can return error number,
it should be better to check the return value and
deal with the exception.

Fixes: 0ba002bc4393 ("virt: Add vboxguest driver for Virtual Box Guest integration")
Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
---
 drivers/virt/vboxguest/vboxguest_linux.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/virt/vboxguest/vboxguest_linux.c b/drivers/virt/vboxguest/vboxguest_linux.c
index 4ccfd30c2a30..0fee8e6ee6e0 100644
--- a/drivers/virt/vboxguest/vboxguest_linux.c
+++ b/drivers/virt/vboxguest/vboxguest_linux.c
@@ -390,8 +390,13 @@ static int vbg_pci_probe(struct pci_dev *pci, const struct pci_device_id *id)
 	}
 
 	pci_set_drvdata(pci, gdev);
-	device_create_file(dev, &dev_attr_host_version);
-	device_create_file(dev, &dev_attr_host_features);
+
+	ret = device_create_file(dev, &dev_attr_host_version);
+	if (ret)
+		goto err_unregister_misc_device_user;
+	ret = device_create_file(dev, &dev_attr_host_features);
+	if (ret)
+		goto err_unregister_misc_device_user;
 
 	vbg_info("vboxguest: misc device minor %d, IRQ %d, I/O port %x, MMIO at %pap (size %pap)\n",
 		 gdev->misc_device.minor, pci->irq, gdev->io_port,
-- 
2.25.1