From 66bb6c2c4445d39f4086637d425da77dcc3364ae Mon Sep 17 00:00:00 2001
From: Ben Hutchings <ben.hutchings@codethink.co.uk>
Date: Thu, 11 Jan 2018 17:01:36 +0000
Subject: [PATCH] xhci: Fix ring leak in failure path of
xhci_alloc_virt_device()
This is a stable-only fix for the backport of commit 5d9b70f7d52e
("xhci: Don't add a virt_dev to the devs array before it's fully
allocated").
In branches that predate commit c5628a2af83a ("xhci: remove endpoint
ring cache") there is an additional failure path in
xhci_alloc_virt_device() where ring cache allocation fails, in
which case we need to free the ring allocated for endpoint 0.
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Cc: Mathias Nyman <mathias.nyman@intel.com>
---
drivers/usb/host/xhci-mem.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index 82eea55a7b5c..3b7d69ca83be 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -1086,7 +1086,8 @@ int xhci_alloc_virt_device(struct xhci_hcd *xhci, int slot_id,
return 1;
fail:
-
+ if (dev->eps[0].ring)
+ xhci_ring_free(xhci, dev->eps[0].ring);
if (dev->in_ctx)
xhci_free_container_ctx(xhci, dev->in_ctx);
if (dev->out_ctx)
--
2.30.9