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xhci: For streams the dequeue ptr must be read from the stream ctx

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This fixes TR dequeue validation failing on Intel XHCI controllers with the
following warning:

Mismatch between completed Set TR Deq Ptr command & xHCI internal state.

Interestingly enough reading the deq ptr from the ep ctx after a
TR Deq Ptr command does work on a Nec XHCI controller, it seems the Nec
writes the ptr to both the ep and stream contexts when streams are used.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
This commit is contained in:
Hans de Goede
2013-10-04 00:29:49 +02:00
committed by Sarah Sharp
parent 95241dbdf8
commit 9aad95e292
2 changed files with 16 additions and 7 deletions
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drivers/usb/host/xhci.h
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@@ -703,6 +703,7 @@ struct xhci_ep_ctx {
/* deq bitmasks */
#define EP_CTX_CYCLE_MASK (1 << 0)
#define SCTX_DEQ_MASK (~0xfL)
/**