linux-kernel - Re: [PATCH 4/9] nvmem: sprd: Fix an error message

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Date:   Fri, 11 Jun 2021 11:17:50 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc:     linux-kernel@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        Chunyan Zhang <zhang.lyra@...il.com>
Subject: Re: [PATCH 4/9] nvmem: sprd: Fix an error message

On Fri, Jun 11, 2021 at 10:05:40AM +0100, Srinivas Kandagatla wrote:
> 
> 
> On 11/06/2021 09:56, Greg KH wrote:
> > On Fri, Jun 11, 2021 at 09:33:43AM +0100, Srinivas Kandagatla wrote:
> > > From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
> > > 
> > > 'ret' is known to be 0 here.
> > > The expected error status is stored in 'status', so use it instead.
> > > 
> > > Also change %d in %u, because status is an u32, not a int.
> > > 
> > > Fixes: 096030e7f449 ("nvmem: sprd: Add Spreadtrum SoCs eFuse support")
> > > Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
> > > Acked-by: Chunyan Zhang <zhang.lyra@...il.com>
> > > Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
> > > ---
> > >   drivers/nvmem/sprd-efuse.c | 2 +-
> > >   1 file changed, 1 insertion(+), 1 deletion(-)
> > > 
> > > diff --git a/drivers/nvmem/sprd-efuse.c b/drivers/nvmem/sprd-efuse.c
> > > index 5d394559edf2..e3e721d4c205 100644
> > > --- a/drivers/nvmem/sprd-efuse.c
> > > +++ b/drivers/nvmem/sprd-efuse.c
> > > @@ -234,7 +234,7 @@ static int sprd_efuse_raw_prog(struct sprd_efuse *efuse, u32 blk, bool doub,
> > >   	status = readl(efuse->base + SPRD_EFUSE_ERR_FLAG);
> > >   	if (status) {
> > >   		dev_err(efuse->dev,
> > > -			"write error status %d of block %d\n", ret, blk);
> > > +			"write error status %u of block %d\n", status, blk);
> > 
> > Shouldn't this be %pe and not %u?
> 
> This is not error pointer its status value read back from a register.
> 
> I think %u should be good here.

Argh, you are right, my fault.  For some reason I thought this worked
for integers as well.  Don't we have such a printk modifier somewhere to
turn error values into strings?  Let me dig...


thanks

greg k-h