From: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
3.12-stable review patch. If anyone has any objections, please let me know.
===============
commit c207e7c50f31113c24a9f536fcab1e8a256985d7 upstream.
If xhci initialization fails before the roothub bandwidth
domains (xhci->rh_bw[i]) are allocated it will oops when
trying to access rh_bw members in xhci_mem_cleanup().
Reported-by: Manuel Reimer <manuel.reimer@xxxxxx>
Signed-off-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
drivers/usb/host/xhci-mem.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index 4483e6a307c0..837c333c827f 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -1723,7 +1723,7 @@ void xhci_mem_cleanup(struct xhci_hcd *xhci)
}
num_ports = HCS_MAX_PORTS(xhci->hcs_params1);
- for (i = 0; i < num_ports; i++) {
+ for (i = 0; i < num_ports && xhci->rh_bw; i++) {
struct xhci_interval_bw_table *bwt = &xhci->rh_bw[i].bw_table;
for (j = 0; j < XHCI_MAX_INTERVAL; j++) {
struct list_head *ep = &bwt->interval_bw[j].endpoints;
--
2.1.1
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