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authorDmitry Torokhov <dtor@vmware.com>2011-04-12 23:06:28 -0700
committerSarah Sharp <sarah.a.sharp@linux.intel.com>2011-04-13 16:57:31 -0700
commit2dea75d96ade3c7cd2bfe73f99c7b3291dc3d03a (patch)
tree5c96640b0f28191b536d918fa870926dc053b1c8 /drivers
parent386139d7c8f22d4983ca89de35d339cc41bb0996 (diff)
USB: xhci - also free streams when resetting devices
Currently, when resetting a device, xHCI driver disables all but one endpoints and frees their rings, but leaves alone any streams that might have been allocated. Later, when users try to free allocated streams, we oops in xhci_setup_no_streams_ep_input_ctx() because ep->ring is NULL. Let's free not only rings but also stream data as well, so that calling free_streams() on a device that was reset will be safe. This should be queued for stable trees back to 2.6.35. Reviewed-by: Micah Elizabeth Scott <micah@vmware.com> Signed-off-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable@kernel.org
Diffstat (limited to 'drivers')
-rw-r--r--drivers/usb/host/xhci.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 196e0181b2ed..48706c0d6577 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -2386,10 +2386,18 @@ int xhci_discover_or_reset_device(struct usb_hcd *hcd, struct usb_device *udev)
/* Everything but endpoint 0 is disabled, so free or cache the rings. */
last_freed_endpoint = 1;
for (i = 1; i < 31; ++i) {
- if (!virt_dev->eps[i].ring)
- continue;
- xhci_free_or_cache_endpoint_ring(xhci, virt_dev, i);
- last_freed_endpoint = i;
+ struct xhci_virt_ep *ep = &virt_dev->eps[i];
+
+ if (ep->ep_state & EP_HAS_STREAMS) {
+ xhci_free_stream_info(xhci, ep->stream_info);
+ ep->stream_info = NULL;
+ ep->ep_state &= ~EP_HAS_STREAMS;
+ }
+
+ if (ep->ring) {
+ xhci_free_or_cache_endpoint_ring(xhci, virt_dev, i);
+ last_freed_endpoint = i;
+ }
}
xhci_dbg(xhci, "Output context after successful reset device cmd:\n");
xhci_dbg_ctx(xhci, virt_dev->out_ctx, last_freed_endpoint);

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