Hi, On Sat, Jan 03, 2015 at 02:16:22PM +0200, Aaro Koskinen wrote: > > > > > > >>>When updating (custom DM3730 board) from 3.18.1 ro 3.19-rc2 > > > > > > >>>I see a "In-band ERROR" warning which wasn't present in 3.18.1. > > > > > > >>>Could it be that I missed some DT updates? > > > > > > >> > > > > > > >>>[ 0.366882] In-band Error seen by MPU at address 0 > > > > > > >>>[ 0.366912] ------------[ cut here ]------------ > > > > > > >>>[ 0.366943] WARNING: CPU: 0 PID: 1 at drivers/bus/omap_l3_smx.c:166 omap3_l3_app_irq+0x100/0x134() > > > > > > >> > > > > > > >>This appears also on N900/N950/N9... > > > > > > > > > > > > > >Do you have CONFIG_PREEMPT enabled? It seems there's some > > > > > > >regression related to CONFIG_PREEMPT that started happening > > > > > > >with the merge window? > > > > > > > > > > > > Indeed, when I disable CONFIG_PREEMPT the warning is gone. > > > > > > > > > > Yeah, disabling CONFIG_PREEMPT helps here too. Is there some e-mail > > > > > thread / patch set for this already; or should we try to bisect this? > > > > > > > > AFAIK I'm not aware of other threads, I noticied it with the > > > > "OMAP 4430 SDP: rather sick with recent kernels" thread, but > > > > never got anywhere with it. > > > > > > > > Yeah it seems it's somewhere between v3.18 and v3.19-rc1, but > > > > that too should be verified. Sounds like running git bisect on > > > > this one is needed. > > > > > > I tried to bisect this on N950, and it resulted in: > > > > > > aa25729cfd9709156661bea0f9293deb7729f57a is the first bad commit > > > commit aa25729cfd9709156661bea0f9293deb7729f57a > > > Author: Tony Lindgren <tony@xxxxxxxxxxx> > > > Date: Wed Nov 5 09:21:23 2014 -0800 > > > > > > ARM: OMAP3: Fix errors for omap_l3_smx when booted with device tree > > > > > > But when I tried to revert this from 3.19-rc2, my board won't boot at > > > all... > > > > Hmm OK that commit just fixed the omap_l3_smx so we now see > > warnings about the unclocked register access. > > > > It seems that probably the CONFIG_PREEMPT issue has been lurking > > around for longer but we have not seen any errors because > > omap_l3_smx just recently started exposing them. > > > > Does v3.18 + commit aa25729cfd9 manually applied also produce > > the CONFIG_PREEMPT errors? > > Yes it does, so I made another bisection between 3.17 and 3.18 > using the above patch to trigger the issue, and I got: > > 55601c9f24670ba926ebdd4d712ac3b177232330 is the first bad commit > commit 55601c9f24670ba926ebdd4d712ac3b177232330 > Author: Felipe Balbi <balbi@xxxxxx> > Date: Mon Sep 8 17:54:58 2014 -0700 > > arm: omap: intc: switch over to linear irq domain Just booted AM335x with CONFIG_PREEMPT and haven't seen any problem. Perhaps this is something related to another OMAP3-only driver ? Perhaps HSI/SSI ? cheers -- balbi
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