mmc: Fix hangs related to insert/remove of cards

During a rescan operation mmc_attach(sd|mmc|sdio) functions are
called. The error handling in these function can trigger a detach
of the bus, which also meant a power off. This is not notified by
the rescan operation which then continues to the next attach function.

If a power off has been done, the framework must never send any
new commands to the host driver, without first doing a new power up.
This will most likely trigger any host driver to hang.

Moving power off out of detach and instead handle power off
separately when it is actually needed, solves the issue.

ST-Ericsson Linux next: -
ST-Ericsson ID: 339637
ST-Ericsson FOSS-OUT ID: Trivial

Change-Id: Id808dc84625a953f4469855ad56e8d3b46b5434d
Signed-off-by: Ulf Hansson <ulf.hansson@stericsson.com>
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/30814

0 files changed, 0 insertions, 0 deletions