Messages in this thread | | | Date | Sun, 23 Mar 2003 07:31:50 +1100 | From | Tim Josling <> | Subject | Re: [PATCH] to drivers/parport/ieee1284_ops.c to fix timing dependent hang |
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Jeremy Fitzhardinge wrote: > On Sat, 2003-03-22 at 01:23, Tim Josling wrote: > >>According to my reading of the code, it should only happen in polled >>mode, but I have only one week of experience looking at kernel source. > > > I'm wondering if a better fix might be to have something like: > > if (wait * 2 > wait) > wait *= 2; > > at the bottom of the loop, so that the wrap-around doesn't happen. >
I tried wait *=2; if (wait > 10 * HZ) wait = 10 * HZ; and that worked, so your theory would probably work. However to my mind it is a hack.
> >>So it should be a work-around, assuming interrupts work on the parallel >>port on your system :-). It is an very vexing problem, as I'm sure you know. >> >>By the way, LJ1100s tend to get page feeding problems about the time the >>warranty runs out, but HP has a free kit you can order to fix the problem. > > > Yes, I just installed it. It suddenly made the printer useful again, so > I've printing more, and seeing the hangs. I enabled interrupts, which > seems to work OK. > > J
Good. That (enabling interrupts fixes the problem) tends to add credence to my theory.
Happy printing!
Tim Josling
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