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[79.183.34.164]) by smtp.gmail.com with ESMTPSA id y18sm19181850qki.0.2020.01.05.05.00.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 05 Jan 2020 05:00:04 -0800 (PST) Date: Sun, 5 Jan 2020 07:59:59 -0500 From: "Michael S. Tsirkin" To: qemu-devel@nongnu.org Subject: [PULL v3 31/32] intel_iommu: a fix to vtd_find_as_from_bus_num() Message-ID: <20200105125622.27231-32-mst@redhat.com> References: <20200105125622.27231-1-mst@redhat.com> MIME-Version: 1.0 In-Reply-To: <20200105125622.27231-1-mst@redhat.com> X-Mailer: git-send-email 2.24.1.751.gd10ce2899c X-Mutt-Fcc: =sent X-MC-Unique: CFWs4czvNCC8Nve4bMLopg-1 X-Mimecast-Spam-Score: 0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Content-Disposition: inline X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 207.211.31.81 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Kevin Tian , Jacob Pan , Yi Sun , Eduardo Habkost , qemu-stable@nongnu.org, Peter Xu , Liu Yi L , Paolo Bonzini , Richard Henderson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Liu Yi L Ensure the return value of vtd_find_as_from_bus_num() is NULL by enforcing vtd_bus=3DNULL. This would help caller of vtd_find_as_from_bus_nu= m() to decide if any further operation on the returned vtd_bus. Cc: qemu-stable@nongnu.org Cc: Kevin Tian Cc: Jacob Pan Cc: Peter Xu Cc: Yi Sun Signed-off-by: Liu Yi L Signed-off-by: Yi Sun Message-Id: <1578058086-4288-2-git-send-email-yi.l.liu@intel.com> Reviewed-by: Peter Xu Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/i386/intel_iommu.c | 1 + 1 file changed, 1 insertion(+) diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index ee06993675..609b80750a 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -948,6 +948,7 @@ static VTDBus *vtd_find_as_from_bus_num(IntelIOMMUState= *s, uint8_t bus_num) return vtd_bus; } } + vtd_bus =3D NULL; } return vtd_bus; } --=20 MST