linux-kernel - Re: [PATCH] iommu/qcom: add missing put_device() call in qcom_iommu_of

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Message-ID: <20200921175048.GD3141@willie-the-truck>
Date:   Mon, 21 Sep 2020 18:50:49 +0100
From:   Will Deacon <will@...nel.org>
To:     Yu Kuai <yukuai3@...wei.com>
Cc:     robdclark@...il.com, joro@...tes.org,
        iommu@...ts.linux-foundation.org, linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        yi.zhang@...wei.com
Subject: Re: [PATCH] iommu/qcom: add missing put_device() call in
 qcom_iommu_of_xlate()

On Fri, Sep 18, 2020 at 09:13:57AM +0800, Yu Kuai wrote:
> if of_find_device_by_node() succeed, qcom_iommu_of_xlate() doesn't have
> a corresponding put_device(). Thus add put_device() to fix the exception
> handling for this function implementation.
> 
> Fixes: e86d1aa8b60f ("iommu/arm-smmu: Move Arm SMMU drivers into their own subdirectory")

That's probably not accurate, in that this driver used to live under
drivers/iommu/ and assumedly had this bug there as well.

> Signed-off-by: Yu Kuai <yukuai3@...wei.com>
> ---
>  drivers/iommu/arm/arm-smmu/qcom_iommu.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)

I guess Rob will pick this up.

Will