Hello Dong Adrian and Ulf, I'm working on enabling a BayTrail-based machine with very similar hardware to one of the Intel Compute sticks, which is an Intel BayTrail and has a RTL8723BS WiFi card on the SDIO bus. I'm using Linux 4.8 with the driver from https://github.com/hadess/rtl8723bs, and I was experiencing a complete machine hang when using the WiFi card. Passing `intel_idle.max_cstate=1` together with the following patch (with the sdhci_runtime_pm_get and sdhci_runtime_pm_put implementations added back) makes the problem go away: https://github.com/hadess/rtl8723bs/blob/master/patches_4.5/0002-mmc-sdhci-get-runtime-pm-when-sdio-irq-is-enabled.patch I could not find much information on why this was never sent upstream, and would like to know if this approach would be acceptable, or if there are any other better alternatives to solve this problem. I'm not a runtime PM expert, but as I understand this keeps the device powered on as long as interrupts are enabled, potentially increasing the power consumption. As this kernel has to run several different machines using the same code base and config, I would rather avoid something that could have a negative impact on other platforms. Any ideas appreciated, and I'm happy to try a newer tree if you guys think some other commit might have fixed the problem. Thanks and best regards, -- João Paulo Rechi Vita http://about.me/jprvita -- 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
