We want to give the command abortion an additional try to stop
the command ring before we completely hose xhci.
Cc: <stable@xxxxxxxxxxxxxxx>
Tested-by: Vincent Pelletier <plr.vincent@xxxxxxxxx>
Signed-off-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
---
drivers/usb/host/xhci-ring.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index a47a1e8..1c61e5e 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -302,6 +302,15 @@ static int xhci_abort_cmd_ring(struct xhci_hcd *xhci)
ret = xhci_handshake(&xhci->op_regs->cmd_ring,
CMD_RING_RUNNING, 0, 5 * 1000 * 1000);
if (ret < 0) {
+ /* we are about to kill xhci, give it one more chance */
+ xhci_write_64(xhci, temp_64 | CMD_RING_ABORT,
+ &xhci->op_regs->cmd_ring);
+ udelay(1000);
+ ret = xhci_handshake(&xhci->op_regs->cmd_ring,
+ CMD_RING_RUNNING, 0, 3 * 1000 * 1000);
+ if (ret == 0)
+ return 0;
+
xhci_err(xhci, "Stopped the command ring failed, "
"maybe the host is dead\n");
xhci->xhc_state |= XHCI_STATE_DYING;
--
1.9.1
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