From 61fb50b8328e61b6038d99c6333a60b5b02328d8 Mon Sep 17 00:00:00 2001 From: Oliver Neukum Date: Thu, 10 May 2012 10:19:21 +0200 Subject: [PATCH] USB: fix resource leak in xhci power loss path commit f8a9e72d125f4e00ec529ba67b674321a1f3bf31 upstream. Some more data structures must be freed and counters reset if an XHCI controller has lost power. The failure to do so renders some chips inoperative after a certain number of S4 cycles. This patch should be backported to kernels as old as 3.2, that contain the commits c29eea621900f18287d50519f72cb9113746d75a "xhci: Implement HS/FS/LS bandwidth checking." and commit 839c817ce67178ca3c7c7ad534c571bba1e69ebe "xhci: Implement HS/FS/LS bandwidth checking." Signed-off-by: Oliver Neukum Signed-off-by: Sarah Sharp Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-mem.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index 3c9bb3d..497ed77 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -1791,6 +1791,14 @@ void xhci_mem_cleanup(struct xhci_hcd *xhci) { struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); struct dev_info *dev_info, *next; + struct list_head *tt_list_head; + struct list_head *tt; + struct list_head *endpoints; + struct list_head *ep, *q; + struct xhci_tt_bw_info *tt_info; + struct xhci_interval_bw_table *bwt; + struct xhci_virt_ep *virt_ep; + unsigned long flags; int size; int i; @@ -1850,8 +1858,26 @@ void xhci_mem_cleanup(struct xhci_hcd *xhci) } spin_unlock_irqrestore(&xhci->lock, flags); + bwt = &xhci->rh_bw->bw_table; + for (i = 0; i < XHCI_MAX_INTERVAL; i++) { + endpoints = &bwt->interval_bw[i].endpoints; + list_for_each_safe(ep, q, endpoints) { + virt_ep = list_entry(ep, struct xhci_virt_ep, bw_endpoint_list); + list_del(&virt_ep->bw_endpoint_list); + kfree(virt_ep); + } + } + + tt_list_head = &xhci->rh_bw->tts; + list_for_each_safe(tt, q, tt_list_head) { + tt_info = list_entry(tt, struct xhci_tt_bw_info, tt_list); + list_del(tt); + kfree(tt_info); + } + xhci->num_usb2_ports = 0; xhci->num_usb3_ports = 0; + xhci->num_active_eps = 0; kfree(xhci->usb2_ports); kfree(xhci->usb3_ports); kfree(xhci->port_array); -- 2.7.4