tree aa2aff1bfb5d0788226231f3fde022cec8ede1df
parent 3e1a6892481034193b2502725f787465ebf39818
author Adrian Hunter <adrian.hunter@intel.com> 1389599356 +0200
committer Chris Ball <chris@printf.net> 1390231868 -0500

mmc: sdhci-pci: Fix BYT sd card getting stuck in runtime suspend

A host controller for a SD card may need a GPIO for card detect in order
to wake up from runtime suspend when a card is inserted.  If that GPIO is
not configured, then the host controller will not wake up.  Fix that for
the affected devices by not enabling runtime PM unless the GPIO is
successfully set up.

This affects BYT sd card host controller which had runtime PM enabled from
v3.11.  For completeness, the MFD sd card host controller is flagged also.

The original patch before rebasing (see link below) was tested on v3.11.10
and v3.12.4 although the patch applied with some offsets and fuzz.  The
original patch is here:

    http://marc.info/?l=linux-mmc&m=138676702327057

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: stable <stable@vger.kernel.org> # 3.11+
Signed-off-by: Chris Ball <chris@printf.net>