From: Jiri Slaby <jslaby@suse.cz>
Date: Thu, 4 Nov 2010 14:31:30 +0000 (+0100)
Subject: xen-pcifront: fix PCI reference leak
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=2a63dd7275b2278bd7e9203f74b9aa4f07e82a7a;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

xen-pcifront: fix PCI reference leak

Stanse found that when pdev is found and has no driver a reference is
leaked in pcifront_common_process. So add pci_dev_put there. For the
pdev == NULL case, pci_dev_put(NULL) is fine.

[v2: Updated to not dereference pcidev->dev per Milton's observation]

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Milton Miller <miltonm@bga.com>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
---

diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c
index 05792732718e..3a5a6fcc0ead 100644
--- a/drivers/pci/xen-pcifront.c
+++ b/drivers/pci/xen-pcifront.c
@@ -575,8 +575,9 @@ static pci_ers_result_t pcifront_common_process(int cmd,
 
 	pcidev = pci_get_bus_and_slot(bus, devfn);
 	if (!pcidev || !pcidev->driver) {
-		dev_err(&pcidev->dev,
-			"device or driver is NULL\n");
+		dev_err(&pdev->xdev->dev, "device or AER driver is NULL\n");
+		if (pcidev)
+			pci_dev_put(pcidev);
 		return result;
 	}
 	pdrv = pcidev->driver;