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USB: fix resource leak in xhci power loss path 

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 c29eea6219
"xhci: Implement HS/FS/LS bandwidth checking." and
commit 839c817ce6
"xhci: Implement HS/FS/LS bandwidth checking."

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Oliver Neukum 2012-05-10 10:19:21 +02:00 committed by Sarah Sharp
parent c3e751e4f4
commit f8a9e72d12
1 changed files with 26 additions and 0 deletions
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26
drivers/usb/host/xhci-mem.c
View File

@ -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;
@ -1849,8 +1857,26 @@ 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);