Hi, First of all, thank you for reviewing this. On 09/10/2014 03:40 PM, Oliver Neukum wrote: > On Wed, 2014-09-10 at 13:46 +0200, Hans de Goede wrote: >> - Make sure we always hold the lock when setting / checking resetting >> - Check resetting before checking urb->status >> - Add missing check for resetting to uas_data_cmplt >> - Add missing check for resetting to uas_do_work > > Why is the checking for stat and data inconsistent? With stat urbs there is no direct reference from the urb to the scsi cmnd, since when using usb-2 the sense urbs may arrive in a different order then the cmnds where issued. instead for sense urbs we look up the cmnd by tag, likewise there is no reference from the cmnd back to the sense-urb. For data urbs however the urb->context pointer points directly to the cmnd struct, and the cmnd struct has a pointer back in the form of devinfo->data_[in|out]_urb. When the urb completes we want to NULL the devinfo->data_[in|out]_urb pointers even when resetting. So that we don't try to deref a pointer to a free-ed urb later on (this does not become an issue until after the "uas: Free data urbs on completion" commit). Regards, Hans -- 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
