1. 18 Jul, 2012 2 commits
  2. 17 Jul, 2012 1 commit
  3. 09 Jul, 2012 1 commit
  4. 22 May, 2012 1 commit
  5. 18 May, 2012 1 commit
    • Sarah Sharp's avatar
      USB: Disable hub-initiated LPM for comms devices. · e1f12eb6
      Sarah Sharp authored
      Hub-initiated LPM is not good for USB communications devices.  Comms
      devices should be able to tell when their link can go into a lower power
      state, because they know when an incoming transmission is finished.
      Ideally, these devices would slam their links into a lower power state,
      using the device-initiated LPM, after finishing the last packet of their
      data transfer.
      
      If we enable the idle timeouts for the parent hubs to enable
      hub-initiated LPM, we will get a lot of useless LPM packets on the bus
      as the devices reject LPM transitions when they're in the middle of
      receiving data.  Worse, some devices might blindly accept the
      hub-initiated LPM and power down their radios while they're in the
      middle of receiving a transmission.
      
      The Intel Windows folks are disabling hub-initiated LPM for all USB
      communications devices under a xHCI USB 3.0 host.  In order to keep
      the Linux behavior as close as possible to Windows, we need to do the
      same in Linux.
      
      Set the disable_hub_initiated_lpm flag for for all USB communications
      drivers.  I know there aren't currently any USB 3.0 devices that
      implement these class specifications, but we should be ready if they do.
      Signed-off-by: default avatarSarah Sharp <sarah.a.sharp@linux.intel.com>
      Cc: Marcel Holtmann <marcel@holtmann.org>
      Cc: Gustavo Padovan <gustavo@padovan.org>
      Cc: Johan Hedberg <johan.hedberg@gmail.com>
      Cc: Hansjoerg Lipp <hjlipp@web.de>
      Cc: Tilman Schmidt <tilman@imap.cc>
      Cc: Karsten Keil <isdn@linux-pingi.de>
      Cc: Peter Korsgaard <jacmet@sunsite.dk>
      Cc: Jan Dumon <j.dumon@option.com>
      Cc: Petko Manolov <petkan@users.sourceforge.net>
      Cc: Steve Glendinning <steve.glendinning@smsc.com>
      Cc: "John W. Linville" <linville@tuxdriver.com>
      Cc: Kalle Valo <kvalo@qca.qualcomm.com>
      Cc: "Luis R. Rodriguez" <mcgrof@qca.qualcomm.com>
      Cc: Jouni Malinen <jouni@qca.qualcomm.com>
      Cc: Vasanthakumar Thiagarajan <vthiagar@qca.qualcomm.com>
      Cc: Senthil Balasubramanian <senthilb@qca.qualcomm.com>
      Cc: Christian Lamparter <chunkeey@googlemail.com>
      Cc: Brett Rudley <brudley@broadcom.com>
      Cc: Roland Vossen <rvossen@broadcom.com>
      Cc: Arend van Spriel <arend@broadcom.com>
      Cc: "Franky (Zhenhui) Lin" <frankyl@broadcom.com>
      Cc: Kan Yan <kanyan@broadcom.com>
      Cc: Dan Williams <dcbw@redhat.com>
      Cc: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
      Cc: Ivo van Doorn <IvDoorn@gmail.com>
      Cc: Gertjan van Wingerde <gwingerde@gmail.com>
      Cc: Helmut Schaa <helmut.schaa@googlemail.com>
      Cc: Herton Ronaldo Krzesinski <herton@canonical.com>
      Cc: Hin-Tak Leung <htl10@users.sourceforge.net>
      Cc: Larry Finger <Larry.Finger@lwfinger.net>
      Cc: Chaoming Li <chaoming_li@realsil.com.cn>
      Cc: Daniel Drake <dsd@gentoo.org>
      Cc: Ulrich Kunitz <kune@deine-taler.de>
      Signed-off-by: default avatarSarah Sharp <sarah.a.sharp@linux.intel.com>
      e1f12eb6
  6. 17 May, 2012 1 commit
  7. 16 May, 2012 8 commits
  8. 15 May, 2012 1 commit
  9. 07 May, 2012 8 commits
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  11. 26 Apr, 2012 9 commits
  12. 15 Apr, 2012 1 commit