Endpoints halted on errors, and endpoints stopped manually both used
the same ep->stopped_td to store the halted or stopped td. this causes
confusion and possible races.
There is no longer a need to use the ep->stopped_td variable to store
the halted TD. A halted endpoint is handled immediately and we can pass
it to the handling function directly.
Signed-off-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
---
drivers/usb/host/xhci-ring.c | 8 ++------
drivers/usb/host/xhci.c | 6 +++---
drivers/usb/host/xhci.h | 2 +-
3 files changed, 6 insertions(+), 10 deletions(-)
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 5f60932..e692e76 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -716,9 +716,7 @@ remove_finished_td:
ring_doorbell_for_active_rings(xhci, slot_id, ep_index);
}
- /* Clear stopped_td if endpoint is not halted */
- if (!(ep->ep_state & EP_HALTED))
- ep->stopped_td = NULL;
+ ep->stopped_td = NULL;
/*
* Drop the lock and complete the URBs in the cancelled TD list.
@@ -1732,13 +1730,11 @@ static void xhci_cleanup_halted_endpoint(struct xhci_hcd *xhci,
return;
ep->ep_state |= EP_HALTED;
- ep->stopped_td = td;
ep->stopped_stream = stream_id;
xhci_queue_reset_ep(xhci, command, slot_id, ep_index);
- xhci_cleanup_stalled_ring(xhci, td->urb->dev, ep_index);
+ xhci_cleanup_stalled_ring(xhci, ep_index, td);
- ep->stopped_td = NULL;
ep->stopped_stream = 0;
xhci_ring_cmd_db(xhci);
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 0ea7e12..5be1bff 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -2912,10 +2912,11 @@ static void xhci_setup_input_ctx_for_quirk(struct xhci_hcd *xhci,
}
void xhci_cleanup_stalled_ring(struct xhci_hcd *xhci,
- struct usb_device *udev, unsigned int ep_index)
+ unsigned int ep_index, struct xhci_td *td)
{
struct xhci_dequeue_state deq_state;
struct xhci_virt_ep *ep;
+ struct usb_device *udev = td->urb->dev;
xhci_dbg_trace(xhci, trace_xhci_dbg_reset_ep,
"Cleaning up stalled endpoint ring");
@@ -2924,8 +2925,7 @@ void xhci_cleanup_stalled_ring(struct xhci_hcd *xhci,
* or it will attempt to resend it on the next doorbell ring.
*/
xhci_find_new_dequeue_state(xhci, udev->slot_id,
- ep_index, ep->stopped_stream, ep->stopped_td,
- &deq_state);
+ ep_index, ep->stopped_stream, td, &deq_state);
if (!deq_state.new_deq_ptr || !deq_state.new_deq_seg)
return;
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index d745715..053c9ea 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1825,7 +1825,7 @@ void xhci_queue_new_dequeue_state(struct xhci_hcd *xhci,
unsigned int stream_id,
struct xhci_dequeue_state *deq_state);
void xhci_cleanup_stalled_ring(struct xhci_hcd *xhci,
- struct usb_device *udev, unsigned int ep_index);
+ unsigned int ep_index, struct xhci_td *td);
void xhci_queue_config_ep_quirk(struct xhci_hcd *xhci,
unsigned int slot_id, unsigned int ep_index,
struct xhci_dequeue_state *deq_state);
--
1.8.3.2
--
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