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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?bNRYMqCQUqnaccg9y7B4gWKGPCCfnF3mIhkCqtlZDFnfxtOJr7PTrXX0i/76?= =?us-ascii?Q?UJUjDXnO7WtXnJI0nIzQcYu/cggdiV5IklLfQYJqJUMYdfarmnYt+Vrudy2A?= =?us-ascii?Q?s/pUyzCSrPAQgZGT2Bx3OyjzNLXtd1i9DLND6l48iSSddZM5EwCY6jPHPj/R?= =?us-ascii?Q?OfSWrlT0eanLpBscV4YrFFlsVfFug5fB0xgLyWouzFzIAWMXFq+/oNh/Qm62?= =?us-ascii?Q?VXsgmNwwk+JCL18pqlURi2kMToIoqEWWfjvmQVZf70m1OqLezM2WszquUabC?= =?us-ascii?Q?hY+N7rVwPPa2F4FrgRBdS3oRqnOJfeLM71g88uYe4oWlFLv7XAzRX445JCu0?= =?us-ascii?Q?EJBSBACEuK66savKNZ6EEIyTd20UBC7L0gElHqhJauMnTUokxdhZ8CGgGQMu?= =?us-ascii?Q?GLVJHHpe3/JJgP6TWJjRh/P/QIalIGKMj9zp4TwfaiZppzWf/m3rYqo8SDvS?= =?us-ascii?Q?Rj9mjSONTlnQ+Gw08KO6lEgKiLyQNF6gsYgpESg4XKE2596hS4cSUJbUAqSv?= =?us-ascii?Q?D5+qd+OWq3+WhCOCjg/2cksxlBWwX0Q/hagkNeTME1qdUFp1r7GULzjpwel0?= =?us-ascii?Q?jSZZV7JvyAyYH0+8bJvlmbDbw025eJGh+Gfj00i5TFO+G76gcH21wwuqjzzg?= =?us-ascii?Q?805HgyWjBzDsuT7asU+LwamX7JBP//4CbodTyBDxXjA+CN14uSVi1v1j2+fg?= =?us-ascii?Q?1CDMdDPxegaEuPoDUPvjFz/5H81Mfn+ChcIodC82sa5B4fWb765pdTlxR8VX?= =?us-ascii?Q?jy6qlr78z2905PX3s1kdm8rfi+VO2W26CAKkagzU2Y9iu0Pgq3Mc+RnLcugx?= =?us-ascii?Q?tFQ6X/+Q/Wi7OyJJZAeZW2pD57G4FFu0ZnsnAa8lt4NAakacrx+Olq1NoBlh?= =?us-ascii?Q?1UgkZPkPcaocECxUjsja8ew30Le88Vbp8kzaHAJtDP0FDYs7mWw3qhD29jli?= =?us-ascii?Q?f9K8cTGwp/Gn18HThiHLHi39mq4j1TmzLNkLAj0L1NrpGLoYVVg3beLz3iW9?= =?us-ascii?Q?YAhqQmnXJpyjJSzfdGRQnM1YtVmGtF3yxCeXm1vkogwk29BPGT0xFF6/EUAo?= =?us-ascii?Q?D+NYiVR1EEIBVXRxbIvgVZ6oj5n0mAkEe55tpXRmmZ3x63GbW0PAPsk6WhBu?= =?us-ascii?Q?TiA5g3JpgdvZvKy0Zig0DQ+3p2Lj/goSHAQrhDEP0dBQNmm5peZuYKTLgKP7?= =?us-ascii?Q?uZrHKVExKb11k0/yrtmIX/AH4hgWhjbmMNm8nzRIGkvb0AO/KHFePQS9uSaR?= =?us-ascii?Q?+0eW42VAV3sLJIh12E16qc/ZmQE7YkoEHEr93WWarI5MEjDoJiKRvwSaW6Lx?= =?us-ascii?Q?MquElVYKFscCM8Rl+m8k7KtW?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: 04aa47a6-e6ea-4ac5-bcf1-08d9522ab813 X-MS-Exchange-CrossTenant-AuthSource: BL0PR12MB5506.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Jul 2021 00:49:28.1295 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: yfCGSnsT2LXIcHbDkn6tQQXZp7w6vDa5U3tj3gHCzz49JFRh2DBsMa8f6spfIvio X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL1PR12MB5160 Precedence: bulk List-ID: X-Mailing-List: linux-s390@vger.kernel.org The user can open multiple device FDs if it likes, however the open function calls vfio_register_notifier() on device global state. Calling vfio_register_notifier() twice will trigger a WARN_ON from notifier_chain_register() and the first close will wrongly delete the notifier and more. Since these really want the new open/close_device() semantics just change the function over. Reviewed-by: Zhenyu Wang Reviewed-by: Cornelia Huck Reviewed-by: Christoph Hellwig Signed-off-by: Jason Gunthorpe --- drivers/gpu/drm/i915/gvt/kvmgt.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c index 1ac98f8aba31e6..7efa386449d104 100644 --- a/drivers/gpu/drm/i915/gvt/kvmgt.c +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c @@ -885,7 +885,7 @@ static int intel_vgpu_group_notifier(struct notifier_block *nb, return NOTIFY_OK; } -static int intel_vgpu_open(struct mdev_device *mdev) +static int intel_vgpu_open_device(struct mdev_device *mdev) { struct intel_vgpu *vgpu = mdev_get_drvdata(mdev); struct kvmgt_vdev *vdev = kvmgt_vdev(vgpu); @@ -1004,7 +1004,7 @@ static void __intel_vgpu_release(struct intel_vgpu *vgpu) vgpu->handle = 0; } -static void intel_vgpu_release(struct mdev_device *mdev) +static void intel_vgpu_close_device(struct mdev_device *mdev) { struct intel_vgpu *vgpu = mdev_get_drvdata(mdev); @@ -1753,8 +1753,8 @@ static struct mdev_parent_ops intel_vgpu_ops = { .create = intel_vgpu_create, .remove = intel_vgpu_remove, - .open = intel_vgpu_open, - .release = intel_vgpu_release, + .open_device = intel_vgpu_open_device, + .close_device = intel_vgpu_close_device, .read = intel_vgpu_read, .write = intel_vgpu_write, -- 2.32.0 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,MSGID_FROM_MTA_HEADER, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 36617C432BE for ; Thu, 29 Jul 2021 00:50:08 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 0796E6023B for ; 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Calling vfio_register_notifier() twice will trigger a WARN_ON from notifier_chain_register() and the first close will wrongly delete the notifier and more. Since these really want the new open/close_device() semantics just change the function over. Reviewed-by: Zhenyu Wang Reviewed-by: Cornelia Huck Reviewed-by: Christoph Hellwig Signed-off-by: Jason Gunthorpe --- drivers/gpu/drm/i915/gvt/kvmgt.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c index 1ac98f8aba31e6..7efa386449d104 100644 --- a/drivers/gpu/drm/i915/gvt/kvmgt.c +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c @@ -885,7 +885,7 @@ static int intel_vgpu_group_notifier(struct notifier_block *nb, return NOTIFY_OK; } -static int intel_vgpu_open(struct mdev_device *mdev) +static int intel_vgpu_open_device(struct mdev_device *mdev) { struct intel_vgpu *vgpu = mdev_get_drvdata(mdev); struct kvmgt_vdev *vdev = kvmgt_vdev(vgpu); @@ -1004,7 +1004,7 @@ static void __intel_vgpu_release(struct intel_vgpu *vgpu) vgpu->handle = 0; } -static void intel_vgpu_release(struct mdev_device *mdev) +static void intel_vgpu_close_device(struct mdev_device *mdev) { struct intel_vgpu *vgpu = mdev_get_drvdata(mdev); @@ -1753,8 +1753,8 @@ static struct mdev_parent_ops intel_vgpu_ops = { .create = intel_vgpu_create, .remove = intel_vgpu_remove, - .open = intel_vgpu_open, - .release = intel_vgpu_release, + .open_device = intel_vgpu_open_device, + .close_device = intel_vgpu_close_device, .read = intel_vgpu_read, .write = intel_vgpu_write, -- 2.32.0 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,MSGID_FROM_MTA_HEADER,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C19C4C4320E for ; Thu, 29 Jul 2021 00:50:00 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 931226023B for ; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" The user can open multiple device FDs if it likes, however the open function calls vfio_register_notifier() on device global state. Calling vfio_register_notifier() twice will trigger a WARN_ON from notifier_chain_register() and the first close will wrongly delete the notifier and more. Since these really want the new open/close_device() semantics just change the function over. Reviewed-by: Zhenyu Wang Reviewed-by: Cornelia Huck Reviewed-by: Christoph Hellwig Signed-off-by: Jason Gunthorpe --- drivers/gpu/drm/i915/gvt/kvmgt.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c index 1ac98f8aba31e6..7efa386449d104 100644 --- a/drivers/gpu/drm/i915/gvt/kvmgt.c +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c @@ -885,7 +885,7 @@ static int intel_vgpu_group_notifier(struct notifier_block *nb, return NOTIFY_OK; } -static int intel_vgpu_open(struct mdev_device *mdev) +static int intel_vgpu_open_device(struct mdev_device *mdev) { struct intel_vgpu *vgpu = mdev_get_drvdata(mdev); struct kvmgt_vdev *vdev = kvmgt_vdev(vgpu); @@ -1004,7 +1004,7 @@ static void __intel_vgpu_release(struct intel_vgpu *vgpu) vgpu->handle = 0; } -static void intel_vgpu_release(struct mdev_device *mdev) +static void intel_vgpu_close_device(struct mdev_device *mdev) { struct intel_vgpu *vgpu = mdev_get_drvdata(mdev); @@ -1753,8 +1753,8 @@ static struct mdev_parent_ops intel_vgpu_ops = { .create = intel_vgpu_create, .remove = intel_vgpu_remove, - .open = intel_vgpu_open, - .release = intel_vgpu_release, + .open_device = intel_vgpu_open_device, + .close_device = intel_vgpu_close_device, .read = intel_vgpu_read, .write = intel_vgpu_write, -- 2.32.0 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx