linux-kernel - Re: vfio: powerpc/spapr: One function call less in tce_iommu_attach

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Date:	Mon, 29 Jun 2015 08:02:50 +0200
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	Alexey Kardashevskiy <aik@...abs.ru>,
	Alex Williamson <alex.williamson@...hat.com>,
	kvm@...r.kernel.org
CC:	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>,
	Michael Ellerman <mpe@...erman.id.au>
Subject: Re: vfio: powerpc/spapr: One function call less in tce_iommu_attach_group()
 after kzalloc() failure

> tcegrp will be NULL and kfree() can handle this just fine

The affected function did not show this API knowledge, did it?


> (is not it the whole point of this patchset
> - remove the check and just call kfree() even if the pointer is NULL?).

Partly, yes.


> And if you wanted another label,

I suggest this to improve corresponding exception handling.


> than the existing one should have been renamed to "free_exit" or "free_unlock_exit"
> and new one would be "unlock_exit".

I chose a smaller change at this place.

I am not familiar enough with other called functions there at the moment.
Are the remaining goto statements also update candidates?

Regards,
Markus
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