Re: [PATCH] make ps2 mouse work ...

[Andrew Morton]

Jun Sun <jsun@xxxxxxxxxx> wrote:
>
> 
> I found this problem on a MIPS machine.  The problem is 
> likely to happen on other register-rich RISC arches too.
> 
> cmdcnt needs to be volatile since it is modified by
> irq routine and read by normal process context.

volatile is not the preferred way to fix this up.  This points at either a
locking error in the psmouse driver or a missing "memory" thingy in the
mips port somewhere.

Please describe the bug which led to this patch.  Where was it getting stuck?

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