On Thu, 23 Jul 2009 10:19:45 -0400 (EDT) Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > On Wed, 22 Jul 2009, Alan Cox wrote: > > > > The device is going away, so there's no point in updating the > > > permissions on the device file. The correct thing to do is to delete > > > the file. > > > > However someone has the file open still what happens if the disconnect > > races fchmod() > > The same thing that happens if the disconnect races fchmod() when > nobody has the file open -- whatever that is. fchmod needs a file handle so I don't think that is true. > > A lot of drivers don't reuse minor numbers at all nowdays for exactly > > these reasons. The tty layer can't yet cope with that however. > > Why not? Sure, eventually numbers will have to be reused, but not in Lots of arrays. > the short term. (Unless your system has about as many serial ports as > possible minor numbers.) > > > I raise it as a point of discussion. I'm not sure what the right answer > > is. > > Okay, if enough people end up thinking the patch shouldn't be accepted > then so be it... We'll see. But if that's the case then we should > merge a different patch, one that forces minor numbers not to be reused > even if the device file isn't held open. > > Shall I start up a flame-war^Wdiscussion about this on LKML? Why not. Unless Greg has any specific views on how this should be handled with USB ? -- 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
