On Thu, 15 Mar 2012, Oliver Neukum wrote: > Am Donnerstag, 15. M� 2012, 15:37:16 schrieb Alan Stern: > > On Thu, 15 Mar 2012, Wolfgang Rosenauer wrote: > > > > Sorry I don't know anything about kernel components and USB stuff just > > > thinking out loud that this does not look like a user compatible > > > behaviour ;-) > > > > If more printers show up with the same sort of problem, or lots of > > people using the same model HP Officejet run across the same thing, > > adding a new rule to the udev distribution may be the best answer. > > But the command crashing the reader could come from user space, > couldn't it? So I am afraid this is no solution. It is _a_ solution (it allows Wolfgang to print again), just not a _perfect_ solution. > It seems to me that we > need to make the SCSI layer avoid a reset of this device. Then at least > the printer would work reliably. But what happens if somebody does put in a memory card and the card reader needs to be reset? Data could get lost. A more secure approach would be to prevent usb-storage from binding to the card reader at all. But this would have the disadvantage that people wouldn't be able to use the card reader even while they weren't printing. I can't think of any perfect solutions. Adding pre_reset and post_reset support to usblp would be a good step, but I don't know whether it would solve the problem. Probably not. 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
