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Re: [Qemu-devel] [PATCH v3 1/3] debugcon: fix always print "addr=0x0, va


From: li guang
Subject: Re: [Qemu-devel] [PATCH v3 1/3] debugcon: fix always print "addr=0x0, val=0x0" bug
Date: Thu, 23 May 2013 14:36:00 +0800

在 2013-05-23四的 08:25 +0200,Markus Armbruster写道:
> Cc'ing qemu-trivial.
> 
> liguang <address@hidden> writes:
> 
> > when use DEBUG_DEBUGCON, screen spits:
> > debugcon: write addr=0x0000 val=0x00
> > Rdebugcon: write addr=0x0000 val=0x00
> > udebugcon: write addr=0x0000 val=0x00
> > ndebugcon: write addr=0x0000 val=0x00
> > ndebugcon: write addr=0x0000 val=0x00
> > idebugcon: write addr=0x0000 val=0x00
> > ndebugcon: write addr=0x0000 val=0x00
> > gdebugcon: write addr=0x0000 val=0x00
> >  debugcon: write addr=0x0000 val=0x00
> > odebugcon: write addr=0x0000 val=0x00
> > pdebugcon: write addr=0x0000 val=0x00
> > tdebugcon: write addr=0x0000 val=0x00
> > idebugcon: write addr=0x0000 val=0x00
> > odebugcon: write addr=0x0000 val=0x00
> > ndebugcon: write addr=0x0000 val=0x00
> >  debugcon: write addr=0x0000 val=0x00
> > rdebugcon: write addr=0x0000 val=0x00
> > odebugcon: write addr=0x0000 val=0x00
> > mdebugcon: write addr=0x0000 val=0x00
> >  debugcon: write addr=0x0000 val=0x00
> > adebugcon: write addr=0x0000 val=0x00
> > tdebugcon: write addr=0x0000 val=0x00
> >  debugcon: write addr=0x0000 val=0x00
> >
> > Oh, that's wrong, val is not always be 0.
> > this bug caused by lack of length modifier
> > for specifier 'x'.
> 
> Subject is misleading, it doesn't "always print", only when
> DEBUG_DEBUGCON is enabled.
> 
> Recommend to abridge the commit message radically.

OK, thanks!

> 
> > Signed-off-by: liguang <address@hidden>
> > ---
> >  hw/char/debugcon.c |    2 +-
> >  1 files changed, 1 insertions(+), 1 deletions(-)
> >
> > diff --git a/hw/char/debugcon.c b/hw/char/debugcon.c
> > index 0588eeb..44c93e1 100644
> > --- a/hw/char/debugcon.c
> > +++ b/hw/char/debugcon.c
> > @@ -55,7 +55,7 @@ static void debugcon_ioport_write(void *opaque, hwaddr 
> > addr, uint64_t val,
> >      unsigned char ch = val;
> >  
> >  #ifdef DEBUG_DEBUGCON
> > -    printf("debugcon: write addr=0x%04x val=0x%02x\n", addr, val);
> > +    printf("debugcon: write addr=0x%04" HWADDR_PRIx " val=0x%02x\n", addr, 
> > val);
> >  #endif
> >  
> >      qemu_chr_fe_write(s->chr, &ch, 1);





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