On 03/05/2014 05:50 PM, Samuel Ortiz wrote: > On Wed, Mar 05, 2014 at 05:15:27PM +0100, Arend van Spriel wrote: >> On 03/05/14 11:24, Samuel Ortiz wrote: >>> I'm attaching the log corresponding to a modprobe brcmfmac debug=0x31416 >>> && ifconfig wlan0 up sequence. >>> I have modified this in the driver, to make it less aggressive about >>> SDIO sleeps: >>> >>> sdio_host.h: >>> #define BRCMF_WD_POLL_MS 200 >>> >>> dhd_sdio.c: >>> #define BRCMF_IDLE_INTERVAL 20 >> >> So this log looks fine, because due to the changes above it never >> goes to sleep. The log actually show it is a backport, right? > That's correct, yes. > > >>>>> I also have 2 question for you;-) >>> Sorry if I sounded a bit rude, I didn't mean it :-/ >> >> I did not take it as rude so no worries. >> >>>>> - what mmc host controller is used? >>> So this is sdhci-acpi. >>> >>>>> - do you have CONFIG_RUNTIME_PM enabled? >>> CONFIG_PM_RUNTIME is enabled, yes. Do you want me to test with it >>> disabled ? >>> >> >> I am asking because Russell King recently discovered that SDHCI >> based host controller drivers disable the SDIO interrupt. > You mean they do so from their runtime_suspend hook ? > I see the thread now: > > http://www.spinics.net/lists/arm-kernel/msg308757.html > > It seems those patches have not been reviewed nor merged... > I'll watch that thread closely ;) > >> This would >> explain the timeout on the scan as the scan results are events from >> the device that require this interrupt. Even with your patches this >> may still happen. You can probably disable it for the host >> controller through sysfs. > I did so, and things seem to be more stable. The throughput is a lot > better. Better is expected but 20x better is something else. > I still get fairly weak signal, typically -75 dBm for APs that are a few > meters away. Does that sound like reasonable values to you ? Depending on the definition of a few meters and whether there is a concrete wall in between, I tend to say -75 dBm is crap. Up to 10 meters (without aforementioned wall) I would expect something around -40 dBm. Regards, Arend -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
