Am Sonntag, 8. August 2010, 23:03:55 schrieb Alan Stern: > Oliver: > > I did a little testing. You are right that we will run into problems > with card readers that don't properly track media changes while at low > power. Going through all the partition/volume ID/RAID detection stuff > every few seconds (thanks to hal's polling) would be a real drain. That is unfortunate, even if intellectually somewhat satisfying. > To avoid these problems, I changed sd to make it autosuspend only when > the device file is closed _and_ there is no medium present. The patch > below is just a proof-of-principle; in the end we'll want something > more flexible. Maybe a sysfs attribute to select the conditions under > which autosuspend is allowed. > > What do you think? I agree in principle. But I don't think you can depend on sdkp->media_present remaining constant between sd_open() and sd_release() Regards Oliver -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
