If we fail to queue an evaluate context command or a configure endpoint
command to the command ring in xhci_configure_endpoint(), we need to
remove the xhci_command structure from the device's command list before
returning. If the command is left on the command list, it will sit there
indefinitely, blocking commands submitted after this fails.
Signed-off-by: Sarah Sharp <sarah.a.sharp@xxxxxxxxxxxxxxx>
---
drivers/usb/host/xhci-hcd.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/host/xhci-hcd.c b/drivers/usb/host/xhci-hcd.c
index 5e92c72..0c5c1b2 100644
--- a/drivers/usb/host/xhci-hcd.c
+++ b/drivers/usb/host/xhci-hcd.c
@@ -1181,6 +1181,8 @@ static int xhci_configure_endpoint(struct xhci_hcd *xhci,
ret = xhci_queue_evaluate_context(xhci, in_ctx->dma,
udev->slot_id);
if (ret < 0) {
+ if (command)
+ list_del(&command->cmd_list);
spin_unlock_irqrestore(&xhci->lock, flags);
xhci_dbg(xhci, "FIXME allocate a new ring segment\n");
return -ENOMEM;
--
1.6.3.3
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