If we get a command ring completion, but our command ring dequeue
pointer isn't on the command that completed, print a warning.
Signed-off-by: Sarah Sharp <sarah.a.sharp@xxxxxxxxxxxxxxx>
---
drivers/usb/host/xhci-ring.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index d59eef6..30a4c37 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -1385,6 +1385,13 @@ static void handle_cmd_completion(struct xhci_hcd *xhci,
}
/* Does the DMA address match our internal dequeue pointer address? */
if (cmd_dma != (u64) cmd_dequeue_dma) {
+ xhci_dbg(xhci, "Unexpected command completion for %016llx, dequeue at %016llx.\n",
+ (unsigned long long) cmd_dma,
+ (unsigned long long) cmd_dequeue_dma);
+ xhci_dbg(xhci, "Command ring:\n");
+ xhci_debug_ring(xhci, xhci->cmd_ring);
+ xhci_dbg(xhci, "Event ring:\n");
+ xhci_debug_ring(xhci, xhci->event_ring);
xhci->error_bitmask |= 1 << 5;
return;
}
--
1.7.9
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