On Wed, Jun 13, 2012 at 09:11:13PM -0700, Kuninori Morimoto wrote: > > Laurent Pinchart wrote: > > > > The tmio_mmc_set_ios() function configures the MMC power, clock and bus > > width. When the mmc core requests the driver to power off the card, we > > inform runtime PM, that the controller can be suspended. This can lead > > to the MSTP clock being turned off. > > > > Writing to any 16-bit hardware registers with the MSTP clock off leads > > to timeouts and errors being printed to the kernel log. This can occur > > both when stopping the MMC clock and when configuring the bus width. > > > > To fix this, stop the MMC clock before calling put_runtime_pm(), and > > skip bus width configuration when power is off. > > > > Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> > > --- > > This patch solved kzm9g MicroSD hang-up issue. > > Tested-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx> Yes, it solves that issue for me too. Tested-by: Simon Horman <horms@xxxxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
