On Sun, 12 Feb 2012, Huajun Li wrote: > In do_scan_async(), calling scsi_autopm_put_host(shost) may reference > freed shost, and cause Posison overwitten warning. > Yes, this case can happen, for example, an USB is disconnected just > when do_scan_async() thread starts to run, then scsi_host_put() called > in scsi_finish_async_scan() will lead to shost be freed(because the > refcount of shost->shost_gendev decreases to 1 after USB disconnects), > at this point, if references shost again, system will show following > warning msg. > > To make scsi_autopm_put_host(shost) always reference a valid shost, > put it just before scsi_host_put() in function > scsi_finish_async_scan(). Good catch! Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
