Remove redundant power and card reinitialization cycles involved with SDIO suspend/resume transitions, especially when interacting with SDIO runtime PM. As a result, suspend/resume latencies are reduced and battery life is improved. I have not done any latencies or power measurements, but I am pretty certain the numbers will not be very big. Having said that, common mobile platform (such as Android and OLPC) are aggressively utilizing full system suspend in order to save as much energy as possible. In those systems, suspend/resume transitions happen very frequently, and even small enhancements, as presented in this patchset, may eventually deem substantial. Please note that these changes should be completely safe on all environment. Patches have passed overnight stress with the script mentioned at: http://www.mail-archive.com/linux-mmc@xxxxxxxxxxxxxxx/msg03923.html PS - I'm going on a plane and will not have Internet access so apologies for belated replies. Ohad Ben-Cohen (3): mmc: skip detection of nonremovable cards on rescan mmc: sdio: don't reinitialize nonremovable powered-resumed cards mmc: sdio: don't power up cards on system suspend drivers/mmc/core/core.c | 21 +++++++++++++++++++-- drivers/mmc/core/sdio.c | 16 ++++++++++++++-- drivers/mmc/core/sdio_bus.c | 32 -------------------------------- include/linux/mmc/host.h | 5 +++++ 4 files changed, 38 insertions(+), 36 deletions(-) -- 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
