linux-kernel - Re: [PATCH 00/22] Add and use pci_zalloc

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Date:	Tue, 24 Jun 2014 13:32:49 +0200
From:	Johannes Berg <johannes@...solutions.net>
To:	Julian Calaby <julian.calaby@...il.com>
Cc:	Joe Perches <joe@...ches.com>,
	"Luis R. Rodriguez" <mcgrof@...not-panic.com>,
	Arnd Bergmann <arnd@...db.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
	linux-arch@...r.kernel.org,
	linux-scsi <linux-scsi@...r.kernel.org>, iss_storagedev@...com,
	linux-rdma@...r.kernel.org, netdev <netdev@...r.kernel.org>,
	linux-atm-general@...ts.sourceforge.net,
	linux-wireless <linux-wireless@...r.kernel.org>,
	dri-devel@...ts.freedesktop.org, linux-crypto@...r.kernel.org,
	linux-eata@...onnect.net, linux-media@...r.kernel.org
Subject: Re: [PATCH 00/22] Add and use pci_zalloc_consistent

On Tue, 2014-06-24 at 09:27 +1000, Julian Calaby wrote:

> > - x = (T)pci_alloc_consistent(E1,E2,E3);
> > + x = pci_zalloc_consistent(E1,E2,E3);
> >   if ((x==NULL) || ...) S
> > - memset((T2)x,0,E2);
> 
> I don't know much about SmPL, but wouldn't having that if statement
> there reduce your matches?

Code that matched without the if statement would be buggy, since it
wouldn't be checking the pci_zalloc_consistent return value properly.l

johannes

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