commit: 2dea75d96ade3c7cd2bfe73f99c7b3291dc3d03a From: Dmitry Torokhov <[email protected]> Date: Tue, 12 Apr 2011 23:06:28 -0700 Subject: [PATCH] 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 <[email protected]> Signed-off-by: Dmitry Torokhov <[email protected]> Signed-off-by: Sarah Sharp <[email protected]> Cc: [email protected] --- drivers/usb/host/xhci.c | 16 ++++++++++++---- 1 files changed, 12 insertions(+), 4 deletions(-) diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index 196e018..48706c0 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); _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
