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Thu, 08 Oct 2020 02:56:17 -0700 (PDT) Date: Thu, 8 Oct 2020 11:56:15 +0200 From: Thierry Reding To: Nicolin Chen Cc: joro@8bytes.org, vdumpa@nvidia.com, jonathanh@nvidia.com, digetx@gmail.com, linux-tegra@vger.kernel.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, hch@infradead.org Subject: Re: [PATCH v4 2/2] iommu/tegra-smmu: Expand mutex protection range Message-ID: <20201008095615.GC2349275@ulmo> References: <20200929061325.10197-1-nicoleotsuka@gmail.com> <20200929061325.10197-3-nicoleotsuka@gmail.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="1SQmhf2mF2YjsYvc" Content-Disposition: inline In-Reply-To: <20200929061325.10197-3-nicoleotsuka@gmail.com> User-Agent: Mutt/1.14.7 (2020-08-29) Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org --1SQmhf2mF2YjsYvc Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Sep 28, 2020 at 11:13:25PM -0700, Nicolin Chen wrote: > This is used to protect potential race condition at use_count. > since probes of client drivers, calling attach_dev(), may run > concurrently. >=20 > Signed-off-by: Nicolin Chen > --- >=20 > Changelog > v3->v4: > * Fixed typo "Expend" =3D> "Expand" > v2->v3: > * Renamed label "err_unlock" to "unlock" > v1->v2: > * N/A >=20 > drivers/iommu/tegra-smmu.c | 34 +++++++++++++++++++++------------- > 1 file changed, 21 insertions(+), 13 deletions(-) Acked-by: Thierry Reding --1SQmhf2mF2YjsYvc Content-Type: application/pgp-signature; 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