On Monday 20 August 2007, Bjorn Helgaas wrote: > On Saturday 18 August 2007 01:07:55 am Andrey Borzenkov wrote: > > This is related to thread "2.6.22-rc: regression: no irda0 interface > > (2.6.21 was OK), smsc does not find chip" but it is already way too > > overloaded. > > > > In 2.6.23 smsc-ircc2 fails to initialize IrDA controller. Apparently > > because it by default is using the same IO port as ttyS3 and this is now > > claimed by 8250. > > 8250 should have claimed ttyS3 in 2.6.21 and earlier. So from > the 8250 point of view, 2.6.21 and 2.6.23 should behave the same. > I only know that this worked in 2.6.21. I remind that previous regression was post-2.6.21 which obviously implies that it did work ... For reference I attach dmesg from 2.6.21. I do not see any ttyS3 there ... > From the smsc-ircc2 point of view, 2.6.21 and 2.6.23 should work > the same except for the additional quirk_smc_enable(). If > 2.6.23 is worse than 2.6.21, please try removing the body of > quirk_smc_enable() and see whether that makes 2.6.23 as good > as 2.6.21. > This worked in 2.6.22 with the same quirks. I will test without later but I fail to see how they are related. > For smsc-ircc2, 2.6.23 is definitely a regression from 2.6.22, > because 8250 stayed out of the way in 2.6.22. But we had to > revert 8250 back to the 2.6.21 behavior because the change > swapped ttyS0 and ttyS1 on some machines, so we just have to > live with that 8250/smsc-ircc2 conflict for the time being. > This worked in 2.6.21 and 2.6.22 (and earlier BTW). So if you just had revert to 2.6.21 it would have worked. Something else changed.
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