Am Dienstag, 31. August 2010, 16:13:26 schrieb Alan Stern: > Here's a somewhat related question. Consider those buggy USB card > readers (when restored to full power, they always report that the card > has been changed even if it hasn't). What's the best way to handle > them? I see two possibilities. > > We could simply avoid autosuspend whenever a card is present. Or we > could allow autosuspend and then ignore the media-change notification > when the reader is resumed. (But I suspect that's not a good idea, > since real media changes would be ignored too unless the system > constantly polled the device status.) Either way, we'd need the user > to tell the kernel what to do. Worse. What happens when the system sleeps and the device does not loose power? > Furthermore, other non-buggy devices with removable media might require > special treatment. For example, the user might want to have two > different autosuspend timeouts: one for media present and one for media > not present. If the media-present timeout is set to -1 then it could > have the effect of preventing autosuspend. That is a good plan, as it leaves the problem to someone else. 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
