[PATCH 2/2] xhci: Do not issue device reset when device is not setup

From: Maarten Lankhorst
Date: Wed Jun 01 2011 - 17:28:22 EST

Xhci controllers respond to this by returning an error. Instead of
issuing a command that will fail, just return.

This fixes the xhci driver not working on asrock P67 Pro/Extreme boards.

Signed-off-by: Maarten Lankhorst <m.b.lankhorst@xxxxxxxxx>
drivers/usb/host/xhci.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index d9660eb..a1f32186 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -2467,6 +2467,7 @@ int xhci_discover_or_reset_device(struct usb_hcd *hcd, struct usb_device *udev)
struct xhci_command *reset_device_cmd;
int timeleft;
int last_freed_endpoint;
+ struct xhci_slot_ctx *slot_ctx;

ret = xhci_check_args(hcd, udev, NULL, 0, false, __func__);
if (ret <= 0)
@@ -2499,6 +2500,12 @@ int xhci_discover_or_reset_device(struct usb_hcd *hcd, struct usb_device *udev)
return -EINVAL;

+ /* If device is not setup, there is no point in resetting it */
+ slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->out_ctx);
+ if (GET_SLOT_STATE(le32_to_cpu(slot_ctx->dev_state)) ==
+ return 0;
xhci_dbg(xhci, "Resetting device with slot ID %u\n", slot_id);
/* Allocate the command structure that holds the struct completion.
* Assume we're in process context, since the normal device reset

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