linux-kernel - Re: [PATCH 1/2] qla2xxx: Rewrite logging functions to use %pV

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Date:	Sun, 31 Jul 2011 01:08:50 -0700
From:	Joe Perches <joe@...ches.com>
To:	Rolf Eike Beer <eike-kernel@...tec.de>
Cc:	Andrew Vasquez <andrew.vasquez@...gic.com>,
	linux-driver@...gic.com,
	"James E.J. Bottomley" <jbottomley@...allels.com>,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] qla2xxx: Rewrite logging functions to use %pV

On Sun, 2011-07-31 at 10:02 +0200, Rolf Eike Beer wrote:
> > +	if (vha != NULL) {
> > +		const struct pci_dev *pdev = vha->hw->pdev;
> > +		/* <module-name> <pci-name> <msg-id>:<host> Message */
> > +		pr_warn("%s [%s]-%04x:%ld: %pV",
> > +			QL_MSGHDR, dev_name(&(pdev->dev)), id + ql_dbg_offset,
> > +			vha->host_no, &vaf);
> > +	} else {
> > +		pr_warn("%s [%s]-%04x: : %pV",
> > +			QL_MSGHDR, "0000:00:00.0", id + ql_dbg_offset, &vaf);
> >  	}
> If I would see 0000:00:00.0 in the logmessage I would become scared that
> something is dereferencing cleared memory, use after free or whatever.
> Only by looking into the code I could see that this code simply has no
> idea which device it is on. Well, then don't print an address when you
> don't have one instead of inventing one.

I don't disagree, but that's for Andrew to figure out
in a separate patch.

I just want to make the code smaller.

The output of the new code is the same as the old code.

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