linux-kernel - Re: [PATCH 4.19 27/38] iommu/exynos: add missing put_device() call in exynos_iommu_of

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Message-ID: <20201007094737.GA12593@duo.ucw.cz>
Date:   Wed, 7 Oct 2020 11:47:37 +0200
From:   Pavel Machek <pavel@...x.de>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Yu Kuai <yukuai3@...wei.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Joerg Roedel <jroedel@...e.de>, Sasha Levin <sashal@...nel.org>
Subject: Re: [PATCH 4.19 27/38] iommu/exynos: add missing put_device() call
 in exynos_iommu_of_xlate()

Hi!

> From: Yu Kuai <yukuai3@...wei.com>
> 
> [ Upstream commit 1a26044954a6d1f4d375d5e62392446af663be7a ]
> 
> if of_find_device_by_node() succeed, exynos_iommu_of_xlate() doesn't have
> a corresponding put_device(). Thus add put_device() to fix the exception
> handling for this function implementation.

Okay, this looks reasonable, but...

Do we miss put_device() in normal path, too? I'd expect another
put_device at end of exynos_iommu_of_xlate() or perhaps in release
path somewhere...

Best regards,
								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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