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storage: accept some UAS devices if streams are unavailable

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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 <oliver@neukum.org>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Oliver Neukum
2014-02-11 20:36:04 +01:00
committed by Sarah Sharp
parent 21d0e51bfb
commit 14aec58932
4 changed files with 11 additions and 0 deletions
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include/linux/usb/hcd.h
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@@ -143,6 +143,7 @@ struct usb_hcd {
unsigned authorized_default:1;
unsigned has_tt:1; /* Integrated TT in root hub */
unsigned amd_resume_bug:1; /* AMD remote wakeup quirk */
unsigned can_do_streams:1; /* HC supports streams */
unsigned int irq; /* irq allocated */
void __iomem *regs; /* device memory/io */