diff options
| author | Maarten Lankhorst <m.b.lankhorst@gmail.com> | 2011-06-01 23:27:50 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-06-23 15:05:38 -0700 |
| commit | 604759f768090595b1ee6cb08371c7f9b0625a6f (patch) | |
| tree | 711efe796abadf658f7fbc6c0cc02b65c1a2babe | |
| parent | 91b0ce380e8ce633aa6803f62e70890774a42c53 (diff) | |
xhci: Do not issue device reset when device is not setup
commit 001fd3826f4c736ce292315782d015f768399080 upstream.
xHCI controllers respond to a Reset Device command when the Slot is in the
Enabled/Disabled state by returning an error. This is fine on other host
controllers, but the Etron xHCI host controller returns a vendor-specific
error code that the xHCI driver doesn't understand. The xHCI driver then
gives up on device enumeration.
Instead of issuing a command that will fail, just return. This fixes the
issue with the xhci driver not working on ASRock P67 Pro/Extreme boards.
This should be backported to stable kernels as far back as 2.6.34.
Signed-off-by: Maarten Lankhorst <m.b.lankhorst@gmail.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | 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 d2cd3ce82ffc..d1f074fa821b 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -2284,6 +2284,7 @@ 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) @@ -2316,6 +2317,12 @@ 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)) == + SLOT_STATE_DISABLED) + 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 |