From 14aec589327a6fc4035f5327d90ac5548f501c4c Mon Sep 17 00:00:00 2001 From: Oliver Neukum Date: Tue, 11 Feb 2014 20:36:04 +0100 Subject: storage: accept some UAS devices if streams are unavailable On some older XHCIs streams are not supported and the UAS driver will fail at probe time. For those devices storage should try to bind to UAS devices. This patch adds a flag for stream support to HCDs and evaluates it. [Note: Sarah fixed a bug where the USB 2.0 root hub, not USB 3.0 root hub would get marked as being able to support streams.] Signed-off-by: Oliver Neukum Signed-off-by: Sarah Sharp Acked-by: Hans de Goede --- drivers/usb/storage/uas-detect.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/usb/storage') diff --git a/drivers/usb/storage/uas-detect.h b/drivers/usb/storage/uas-detect.h index b8a02e12a8a2..bb05b984d5f6 100644 --- a/drivers/usb/storage/uas-detect.h +++ b/drivers/usb/storage/uas-detect.h @@ -72,6 +72,7 @@ static int uas_use_uas_driver(struct usb_interface *intf, { struct usb_host_endpoint *eps[4] = { }; struct usb_device *udev = interface_to_usbdev(intf); + struct usb_hcd *hcd = bus_to_hcd(udev->bus); unsigned long flags = id->driver_info; int r, alt; @@ -80,6 +81,9 @@ static int uas_use_uas_driver(struct usb_interface *intf, if (flags & US_FL_IGNORE_UAS) return 0; + if (udev->speed >= USB_SPEED_SUPER && !hcd->can_do_streams) + return 0; + alt = uas_find_uas_alt_setting(intf); if (alt < 0) return 0; -- cgit v1.2.3