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  1. 10 5月, 2015 5 次提交
  3. 08 5月, 2015 2 次提交
  5. 28 4月, 2015 1 次提交
  7. 08 4月, 2015 10 次提交
  9. 04 4月, 2015 15 次提交
  11. 26 3月, 2015 3 次提交
  13. 24 3月, 2015 2 次提交
    • L
      usb: xhci: apply XHCI_AVOID_BEI quirk to all Intel xHCI controllers · 227a4fd8
      由 Lu Baolu 提交于 
      When a device with an isochronous endpoint is plugged into the Intel
xHCI host controller, and the driver submits multiple frames per URB,
the xHCI driver will set the Block Event Interrupt (BEI) flag on all
but the last TD for the URB. This causes the host controller to place
an event on the event ring, but not send an interrupt. When the last
TD for the URB completes, BEI is cleared, and we get an interrupt for
the whole URB.

However, under Intel xHCI host controllers, if the event ring is full
of events from transfers with BEI set,  an "Event Ring is Full" event
will be posted to the last entry of the event ring,  but no interrupt
is generated. Host will cease all transfer and command executions and
wait until software completes handling the pending events in the event
ring.  That means xHC stops, but event of "event ring is full" is not
notified. As the result, the xHC looks like dead to user.

This patch is to apply XHCI_AVOID_BEI quirk to Intel xHC devices. And
it should be backported to kernels as old as 3.0, that contains the
commit 69e848c2 ("Intel xhci: Support EHCI/xHCI port switching.").
Signed-off-by: NLu Baolu <baolu.lu@linux.intel.com>
Tested-by: NAlistair Grant <akgrant0710@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: NMathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      227a4fd8
    • L
      usb: xhci: handle Config Error Change (CEC) in xhci driver · 9425183d
      由 Lu Baolu 提交于 
      Linux xHCI driver doesn't report and handle port cofig error change.
If Port Configure Error for root hub port occurs, CEC bit in PORTSC
would be set by xHC and remains 1. This happends when the root port
fails to configure its link partner, e.g. the port fails to exchange
port capabilities information using Port Capability LMPs.

Then the Port Status Change Events will be blocked until all status
change bits(CEC is one of the change bits) are cleared('0') (refer to
xHCI spec 4.19.2). Otherwise, the port status change event for this
root port will not be generated anymore, then root port would look
like dead for user and can't be recovered until a Host Controller
Reset(HCRST).

This patch is to check CEC bit in PORTSC in xhci_get_port_status()
and set a Config Error in the return status if CEC is set. This will
cause a ClearPortFeature request, where CEC bit is cleared in
xhci_clear_port_change_bit().

[The commit log is based on initial Marvell patch posted at
http://marc.info/?l=linux-kernel&m=142323612321434&w=2]
Reported-by: NGregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: NLu Baolu <baolu.lu@linux.intel.com>
Cc: stable <stable@vger.kernel.org> # v3.2+
Signed-off-by: NMathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      9425183d
  15. 19 3月, 2015 1 次提交
  17. 18 3月, 2015 1 次提交