On Fri, 7 Mar 2014, Oliver Neukum wrote: > > Are there any wakeup-enabled devices that this will mess up? > > Potentially HID. Now that I think about this it seems to me that > drivers really need to be told about the error condition. For > btusb the error condition cannot be handled. For HID it may mean > a lost key or click at the worst. The driver should react to such > errors by disabling power management, but that requires that it > become aware of such errors. The only way to notify the driver about the error condition is by a reset-resume callback, and btusb has no such callback. In the case of a mobile device, it seems to me that unbinding and rebinding is more suitable than disabling power management. Especially if these errors are infrequent. Of course, unbind followed by rebind is a natural side effect of logical disconnect. Earlier, you objected to rebinding on the grounds that it could lead to a tight error loop. Unbinding without rebinding would be essentially the same as what the kernel does now. Alan Stern -- 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
