Normally command ring should not be full. If it's full, something weird
happens. Print out the command ring and event ring in this case.
Signed-off-by: Andiry Xu <andiry.xu@xxxxxxx>
---
drivers/usb/host/xhci-ring.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index bb42297..91ca32b 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -3537,6 +3537,10 @@ static int queue_command(struct xhci_hcd *xhci, u32 field1, u32 field2,
reserved_trbs, GFP_ATOMIC);
if (ret < 0) {
xhci_err(xhci, "ERR: No room for command on command ring\n");
+ xhci_warn(xhci, "Command Ring:\n");
+ xhci_debug_ring(xhci, xhci->cmd_ring, 1);
+ xhci_warn(xhci, "Event Ring:\n");
+ xhci_debug_ring(xhci, xhci->event_ring, 1);
if (command_must_succeed)
xhci_err(xhci, "ERR: Reserved TRB counting for "
"unfailable commands failed.\n");
--
1.7.4.1
--
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