From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 21C826FBB for ; Tue, 10 Jan 2023 18:32:17 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 584F4C433EF; Tue, 10 Jan 2023 18:32:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1673375536; bh=ZhtmRA+u4gIHaC5Y3uDMv1g2djYMOG01OpYmHtIJe4o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zOPbiyH49+8C9KXjDz+rYIYsZ0uz790mdMU66E+8JuN34zgNsySs2AfUxEvmNC9EU jHuSOyDNXYzgHc/S7HyvUo4j9zSYzZ0KRx3kOFeH1bQuXNbPxCN+HluNYExG1POS4J P9/0Nwq2tfDSlSug0IyBF44lCmyIHHXohSnN134E= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Stefano Garzarella , "Michael S. Tsirkin" , Jason Wang , =?UTF-8?q?Eugenio=20P=C3=A9rez?= , Sasha Levin Subject: [PATCH 5.15 221/290] vdpa_sim: fix vringh initialization in vdpasim_queue_ready() Date: Tue, 10 Jan 2023 19:05:13 +0100 Message-Id: <20230110180039.638536509@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230110180031.620810905@linuxfoundation.org> References: <20230110180031.620810905@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Stefano Garzarella [ Upstream commit 794ec498c9fa79e6bfd71b931410d5897a9c00d4 ] When we initialize vringh, we should pass the features and the number of elements in the virtqueue negotiated with the driver, otherwise operations with vringh may fail. This was discovered in a case where the driver sets a number of elements in the virtqueue different from the value returned by .get_vq_num_max(). In vdpasim_vq_reset() is safe to initialize the vringh with default values, since the virtqueue will not be used until vdpasim_queue_ready() is called again. Fixes: 2c53d0f64c06 ("vdpasim: vDPA device simulator") Signed-off-by: Stefano Garzarella Message-Id: <20221110141335.62171-1-sgarzare@redhat.com> Signed-off-by: Michael S. Tsirkin Acked-by: Jason Wang Acked-by: Eugenio Pérez Signed-off-by: Sasha Levin --- drivers/vdpa/vdpa_sim/vdpa_sim.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c index 2faf3bd1c3ba..4d9e3fdae5f6 100644 --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c @@ -66,8 +66,7 @@ static void vdpasim_queue_ready(struct vdpasim *vdpasim, unsigned int idx) { struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx]; - vringh_init_iotlb(&vq->vring, vdpasim->dev_attr.supported_features, - VDPASIM_QUEUE_MAX, false, + vringh_init_iotlb(&vq->vring, vdpasim->features, vq->num, false, (struct vring_desc *)(uintptr_t)vq->desc_addr, (struct vring_avail *) (uintptr_t)vq->driver_addr, -- 2.35.1