[PATCH v1] fbdev/offb: fix PCI device reference leak on probe failure

[PATCH v1] fbdev/offb: fix PCI device reference leak on probe failure

[Yuho Choi]

offb_init_nodriver() gets a referenced PCI device with
pci_get_device(). If pci_enable_device() fails, the function returns
without dropping that reference.

Release the PCI device reference before returning from the
pci_enable_device() failure path.

Fixes: 5bda8f7b5468 ("video: fbdev: offb: Call pci_enable_device() before using the PCI VGA device")
Co-developed-by: Myeonghun Pak <mhun512@gmail.com>
Signed-off-by: Myeonghun Pak <mhun512@gmail.com>
Co-developed-by: Ijae Kim <ae878000@gmail.com>
Signed-off-by: Ijae Kim <ae878000@gmail.com>
Co-developed-by: Taegyu Kim <tmk5904@psu.edu>
Signed-off-by: Taegyu Kim <tmk5904@psu.edu>
Signed-off-by: Yuho Choi <dbgh9129@gmail.com>
---
 drivers/video/fbdev/offb.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/video/fbdev/offb.c b/drivers/video/fbdev/offb.c
index f85428e13996b..166b2dff36f59 100644
--- a/drivers/video/fbdev/offb.c
+++ b/drivers/video/fbdev/offb.c
@@ -640,8 +640,13 @@ static void offb_init_nodriver(struct platform_device *parent, struct device_nod
 			vid = be32_to_cpup(vidp);
 			did = be32_to_cpup(didp);
 			pdev = pci_get_device(vid, did, NULL);
-			if (!pdev || pci_enable_device(pdev))
+			if (!pdev)
 				return;
+
+			if (pci_enable_device(pdev)) {
+				pci_dev_put(pdev);
+				return;
+			}
 		}
 #endif
 		/* kludge for valkyrie */
-- 
2.50.1 (Apple Git-155)