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[83.51.162.1]) by smtp.gmail.com with ESMTPSA id k15sm2231802eji.49.2020.06.30.08.19.54 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 30 Jun 2020 08:19:54 -0700 (PDT) Subject: Re: [PATCH 1/2] xen: fix legacy 'xen-sysdev' and 'xen-backend' bus types To: Paul Durrant , xen-devel@lists.xenproject.org, qemu-devel@nongnu.org References: <20200624121841.17971-1-paul@xen.org> <20200624121841.17971-2-paul@xen.org> From: =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= Autocrypt: addr=philmd@redhat.com; keydata= mQINBDXML8YBEADXCtUkDBKQvNsQA7sDpw6YLE/1tKHwm24A1au9Hfy/OFmkpzo+MD+dYc+7 bvnqWAeGweq2SDq8zbzFZ1gJBd6+e5v1a/UrTxvwBk51yEkadrpRbi+r2bDpTJwXc/uEtYAB GvsTZMtiQVA4kRID1KCdgLa3zztPLCj5H1VZhqZsiGvXa/nMIlhvacRXdbgllPPJ72cLUkXf z1Zu4AkEKpccZaJspmLWGSzGu6UTZ7UfVeR2Hcc2KI9oZB1qthmZ1+PZyGZ/Dy+z+zklC0xl XIpQPmnfy9+/1hj1LzJ+pe3HzEodtlVA+rdttSvA6nmHKIt8Ul6b/h1DFTmUT1lN1WbAGxmg CH1O26cz5nTrzdjoqC/b8PpZiT0kO5MKKgiu5S4PRIxW2+RA4H9nq7nztNZ1Y39bDpzwE5Sp bDHzd5owmLxMLZAINtCtQuRbSOcMjZlg4zohA9TQP9krGIk+qTR+H4CV22sWldSkVtsoTaA2 qNeSJhfHQY0TyQvFbqRsSNIe2gTDzzEQ8itsmdHHE/yzhcCVvlUzXhAT6pIN0OT+cdsTTfif MIcDboys92auTuJ7U+4jWF1+WUaJ8gDL69ThAsu7mGDBbm80P3vvUZ4fQM14NkxOnuGRrJxO qjWNJ2ZUxgyHAh5TCxMLKWZoL5hpnvx3dF3Ti9HW2dsUUWICSQARAQABtDJQaGlsaXBwZSBN YXRoaWV1LURhdWTDqSAoUGhpbCkgPHBoaWxtZEByZWRoYXQuY29tPokCVQQTAQgAPwIbDwYL CQgHAwIGFQgCCQoLBBYCAwECHgECF4AWIQSJweePYB7obIZ0lcuio/1u3q3A3gUCXsfWwAUJ KtymWgAKCRCio/1u3q3A3ircD/9Vjh3aFNJ3uF3hddeoFg1H038wZr/xi8/rX27M1Vj2j9VH 0B8Olp4KUQw/hyO6kUxqkoojmzRpmzvlpZ0cUiZJo2bQIWnvScyHxFCv33kHe+YEIqoJlaQc JfKYlbCoubz+02E2A6bFD9+BvCY0LBbEj5POwyKGiDMjHKCGuzSuDRbCn0Mz4kCa7nFMF5Jv piC+JemRdiBd6102ThqgIsyGEBXuf1sy0QIVyXgaqr9O2b/0VoXpQId7yY7OJuYYxs7kQoXI 6WzSMpmuXGkmfxOgbc/L6YbzB0JOriX0iRClxu4dEUg8Bs2pNnr6huY2Ft+qb41RzCJvvMyu gS32LfN0bTZ6Qm2A8ayMtUQgnwZDSO23OKgQWZVglGliY3ezHZ6lVwC24Vjkmq/2yBSLakZE 6DZUjZzCW1nvtRK05ebyK6tofRsx8xB8pL/kcBb9nCuh70aLR+5cmE41X4O+MVJbwfP5s/RW 9BFSL3qgXuXso/3XuWTQjJJGgKhB6xXjMmb1J4q/h5IuVV4juv1Fem9sfmyrh+Wi5V1IzKI7 RPJ3KVb937eBgSENk53P0gUorwzUcO+ASEo3Z1cBKkJSPigDbeEjVfXQMzNt0oDRzpQqH2vp apo2jHnidWt8BsckuWZpxcZ9+/9obQ55DyVQHGiTN39hkETy3Emdnz1JVHTU0Q== Message-ID: Date: Tue, 30 Jun 2020 17:19:53 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: <20200624121841.17971-2-paul@xen.org> Content-Language: en-US Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=philmd@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=207.211.31.81; envelope-from=philmd@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/30 02:00:02 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN X-Spam_action: no action 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: Anthony Perard , Paul Durrant , Stefano Stabellini , Jason Andryuk Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 6/24/20 2:18 PM, Paul Durrant wrote: > From: Paul Durrant > > 'xen-sysdev' plugs into the 'System' bus type, not 'xen-sysbus. That bus type > is what 'xen-backend' plugs into. > 'xen-sysdev' is drived form 'sys-bus-device' so the bus type need not be > overridden. 'xen-backend' is derived from 'device', which plugs into the > generic 'bus' type, so its bus type should be overridden to 'xen-sysbus'. > > Without this patch, the following assertion will fail: > > qemu-system-i386: hw/core/qdev.c:102: qdev_set_parent_bus: Assertion > `dc->bus_type && object_dynamic_cast(OBJECT(bus), dc->bus_type)' > failed. > > Reported-by: Jason Andryuk > Fixes: 81cb05732efb ("qdev: Assert devices are plugged into a bus that can take them") > Signed-off-by: Paul Durrant > --- > Cc: Stefano Stabellini > Cc: Anthony Perard > --- > hw/xen/xen-legacy-backend.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/hw/xen/xen-legacy-backend.c b/hw/xen/xen-legacy-backend.c > index 2335ee2e65..c5c75c0064 100644 > --- a/hw/xen/xen-legacy-backend.c > +++ b/hw/xen/xen-legacy-backend.c > @@ -789,11 +789,12 @@ static void xendev_class_init(ObjectClass *klass, void *data) > set_bit(DEVICE_CATEGORY_MISC, dc->categories); > /* xen-backend devices can be plugged/unplugged dynamically */ > dc->user_creatable = true; > + dc->bus_type = TYPE_XENSYSBUS; > } > > static const TypeInfo xendev_type_info = { > .name = TYPE_XENBACKEND, > - .parent = TYPE_XENSYSDEV, > + .parent = TYPE_DEVICE, > .class_init = xendev_class_init, > .instance_size = sizeof(struct XenLegacyDevice), > }; > @@ -824,7 +825,6 @@ static void xen_sysdev_class_init(ObjectClass *klass, void *data) > DeviceClass *dc = DEVICE_CLASS(klass); > > device_class_set_props(dc, xen_sysdev_properties); > - dc->bus_type = TYPE_XENSYSBUS; > } > > static const TypeInfo xensysdev_info = { > Reviewed-by: Philippe Mathieu-Daudé