linux-kernel - [PATCH 0/4 v6] Keep rtsx_usb suspended when there's no card

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Date:   Wed, 31 Oct 2018 14:58:59 +0800
From:   Kai-Heng Feng <kai.heng.feng@...onical.com>
To:     arnd@...db.de, gregkh@...uxfoundation.org
Cc:     ulf.hansson@...aro.org, stern@...land.harvard.edu,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Kai-Heng Feng <kai.heng.feng@...onical.com>
Subject: [PATCH 0/4 v6] Keep rtsx_usb suspended when there's no card

Hi,

This is based on Ulf's work [1] [2].

This patch series can keep rtsx_usb suspended, to save ~0.5W on Intel
platforms and ~1.5W on AMD platforms.

[1] https://patchwork.kernel.org/patch/10440583/
[2] https://patchwork.kernel.org/patch/10445725/

Kai-Heng Feng (4):
  misc: rtsx_usb: Use USB remote wakeup signaling for card insertion
    detection
  memstick: Prevent memstick host from getting runtime suspended during
    card detection
  memstick: rtsx_usb_ms: Use ms_dev() helper
  memstick: rtsx_usb_ms: Support runtime power management

v6: Move pm_runtime_get_noresume() to media_check(), to avoid
    potentially unblanced rpm count.

v5: Corretly use system suspend/resume and runtime suspend/resume callback.
    Prevent runtime callbacks get call during system suspend.

v4: Use pm_runtime_put() in memstick_check().

v3: Skip parent device check in rtsx_usb_resume_child().
    Remove dev_dbg() if it only prints function name.
    Use ms_dev() helper at more places.
    Remove const qualifier for UNIVERSAL_DEV_PM_OPS.

v2: Resend to linux-usb and LKML.

 drivers/memstick/core/memstick.c    |   3 +
 drivers/memstick/host/rtsx_usb_ms.c | 173 +++++++++++++++++-----------
 drivers/misc/cardreader/rtsx_usb.c  |   8 ++
 3 files changed, 116 insertions(+), 68 deletions(-)

-- 
2.17.1