Re: i2c-omap.c vs. qemu: too much work in one irq (and broken boot)

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On Monday 02 October 2017 00:19:35 Pavel Machek wrote:
> Hi!
> 
> > I'm trying to get qemu emulation of Nokia N900 to work, but
> > unfortunately i2c-omap.c breaks boot in the emulator (real hardware
> > works ok).
> 
> I started bisection. v4.6 works, v4.7 is broken. (It still may be
> config difference or something).
> 
> This looked suspect, so I tried reverting it, but it did not help. And
> it is only significant change in i2c-omap.c. So... this may be a lot
> of fun.
> 
> commit 126a66caec4a00b8d66dbc3174b0efa905cf68c3
> Author: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
> Date:   Mon Apr 4 16:55:23 2016 +0300
> 
> Unfortunately, mmc is broken in v4.6, so its useless for
> emulation... [ 3.236724] mmc1: error -22 whilst initialising SDIO card

Hi! You can apply special patch to make mmc work in both qemu and real
N900 device for previous kernel versions...

https://github.com/pali/linux-n900/commit/eb080ecdcfc5868d8e36d0f5f42d9cb7f13b4db9

-- 
Pali Rohár
pali.rohar@xxxxxxxxx
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