From nobody Sat Feb 7 08:43:55 2026 Received: from sender4-pp-f112.zoho.com (sender4-pp-f112.zoho.com [136.143.188.112]) (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 0504E3ECBC8 for ; Tue, 20 Jan 2026 12:15:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=pass smtp.client-ip=136.143.188.112 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768911324; cv=pass; b=s4cWN6Gftxme/HkYgdcSGr9YvpdCml5NNqXzmNSBYbpW2SaD7pjXnwg0fZ5PTq6NN0s3F0WChphKMDln+EBT358G7cUu49OxYF6+YpFvaBHiw9m5Mw51hs0M8FCGFy1JYgLYU9TEtWYVjFPc6DUtf9eUIMPvasFmqwH5GvQgI3I= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768911324; c=relaxed/simple; bh=81WPNVvSkbGZ2+rxdVBXgRb0M1OQb6RwpxargetRu4Y=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=cRcL0gVypNENhvsd17cbfj3uhPJS9mfhNwwpCpelbwOCNs6TH68Gr18e5m9nhYGwmcaR6r9YwbE7YC1cTrcbQ2g+wzk/AAWTjF90KLfj3LKGFNR+2676cuGFePb1+hEh/KF8xq0rj9Xb0nJrUrDXP55XHlDsltJ97TmhCt9eFns= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=linux.beauty; spf=pass smtp.mailfrom=linux.beauty; dkim=pass (1024-bit key) header.d=linux.beauty header.i=me@linux.beauty header.b=GGMzYIDm; arc=pass smtp.client-ip=136.143.188.112 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=linux.beauty Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.beauty Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.beauty header.i=me@linux.beauty header.b="GGMzYIDm" ARC-Seal: i=1; a=rsa-sha256; t=1768911308; cv=none; d=zohomail.com; s=zohoarc; b=YXxwjvWSeLZi6CCwaibn3INm4Vs56XXK6QpR/BbBmLkO99l3JU9K1E/qj6CcFEvwazFoGf6ARxGVQY+PKbYLf8aGkUagRD0EqINLd5b9pIXbfqbRFzn9esg4MI1pGyzgoTqPqQHeM+II+sdJzLLBiYAt8+PYx1nisIybXV6KMNY= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1768911308; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:MIME-Version:Message-ID:Subject:Subject:To:To:Message-Id:Reply-To; bh=PDhEzQHy8dg1/gKCobx6aIYWb0SnjO8VklaqmQdV+uo=; b=hmL2gGAgl4ANilT+dhZDGyPaOOmKUNnLXr3jTw8HxFhO+I/anwL61GXqwiKUl/R/EeDTb7Nrb4IFmfQjZIUzo44cbhzhLQA6marWjTOQsuO5GWbutKZv50B+255Jnzq041fNu8V11gieYeAHcB7bQqeWInA/eOzqkwTYHj5k1Ms= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=linux.beauty; spf=pass smtp.mailfrom=me@linux.beauty; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1768911308; s=zmail; d=linux.beauty; i=me@linux.beauty; h=From:From:To:To:Cc:Cc:Subject:Subject:Date:Date:Message-ID:MIME-Version:Content-Transfer-Encoding:Message-Id:Reply-To; bh=PDhEzQHy8dg1/gKCobx6aIYWb0SnjO8VklaqmQdV+uo=; b=GGMzYIDm8lDQG6tGyWJov7FYbDGKDjEOFWJKJgwbd5f7lxJIKkb1ljTY0IHTgV9A Xw1XrAaAtujLIUQzDYNh9G2ML34BRZ3PEe/R6KztKdZC9j8clV1wGXEFTjBI8qVaV7B 0VHOddt7Hwr0JKKg3eUbTYqvfjzASsXJ4ML10L3M= Received: by mx.zohomail.com with SMTPS id 1768911305047450.0820003082039; Tue, 20 Jan 2026 04:15:05 -0800 (PST) From: Li Chen To: Lyude Paul , Danilo Krummrich , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , dri-devel@lists.freedesktop.org, nouveau@lists.freedesktop.org, linux-kernel@vger.kernel.org Cc: Li Chen Subject: [PATCH] nouveau: pci: quiesce GPU on shutdown Date: Tue, 20 Jan 2026 20:14:55 +0800 Message-ID: <20260120121455.142960-1-me@linux.beauty> X-Mailer: git-send-email 2.52.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMailClient: External Content-Type: text/plain; charset="utf-8" Kexec reboot does not reset PCI devices. Invoking the full DRM/TTM teardown from ->shutdown can trigger WARNs when userspace still holds DRM file descriptors. Quiesce the GPU through the suspend path and then power down the PCI function so the next kernel can re-initialize the device from a consistent state. WARNING: drivers/gpu/drm/drm_mode_config.c:578 at drm_mode_config_cleanup+0= x2e7/0x300, CPU#2: kexec/1300 Call Trace: ? srso_return_thunk+0x5/0x5f ? enable_work+0x3a/0x100 nouveau_display_destroy+0x39/0x70 [nouveau c19e0da7fd83583a023f855c510d9a3= 903808734] nouveau_drm_device_fini+0x7b/0x1f0 [nouveau c19e0da7fd83583a023f855c510d9a= 3903808734] nouveau_drm_shutdown+0x52/0xc0 [nouveau c19e0da7fd83583a023f855c510d9a3903= 808734] pci_device_shutdown+0x35/0x60 device_shutdown+0x11c/0x1b0 kernel_kexec+0x13a/0x160 __do_sys_reboot+0x209/0x240 do_syscall_64+0x81/0x610 ? srso_return_thunk+0x5/0x5f ? __rtnl_unlock+0x37/0x70 ? srso_return_thunk+0x5/0x5f ? netdev_run_todo+0x63/0x570 ? netif_change_flags+0x54/0x70 ? srso_return_thunk+0x5/0x5f ? devinet_ioctl+0x1e5/0x790 ? srso_return_thunk+0x5/0x5f ? inet_ioctl+0x1e9/0x200 ? srso_return_thunk+0x5/0x5f ? srso_return_thunk+0x5/0x5f ? sock_do_ioctl+0x7d/0x130 ? srso_return_thunk+0x5/0x5f ? __x64_sys_ioctl+0x97/0xe0 ? srso_return_thunk+0x5/0x5f ? srso_return_thunk+0x5/0x5f ? do_syscall_64+0x23b/0x610 ? srso_return_thunk+0x5/0x5f ? put_user_ifreq+0x7a/0x90 ? srso_return_thunk+0x5/0x5f ? sock_do_ioctl+0x107/0x130 ? srso_return_thunk+0x5/0x5f ? __x64_sys_ioctl+0x97/0xe0 ? srso_return_thunk+0x5/0x5f ? do_syscall_64+0x81/0x610 ? srso_return_thunk+0x5/0x5f ? exc_page_fault+0x7e/0x1a0 entry_SYSCALL_64_after_hwframe+0x76/0x7e nouveau 0000:26:00.0: [drm] drm_WARN_ON(!list_empty(&fb->filp_head)) WARNING: drivers/gpu/drm/drm_framebuffer.c:833 at drm_framebuffer_free+0x73= /0xa0, CPU#2: kexec/1300 Call Trace: drm_mode_config_cleanup+0x248/0x300 ? __pfx___drm_printfn_dbg+0x10/0x10 ? drm_mode_config_cleanup+0x1dc/0x300 nouveau_display_destroy+0x39/0x70 [nouveau c19e0da7fd83583a023f855c510d9a3= 903808734] nouveau_drm_device_fini+0x7b/0x1f0 [nouveau c19e0da7fd83583a023f855c510d9a= 3903808734] nouveau_drm_shutdown+0x52/0xc0 [nouveau c19e0da7fd83583a023f855c510d9a3903= 808734] pci_device_shutdown+0x35/0x60 device_shutdown+0x11c/0x1b0 kernel_kexec+0x13a/0x160 __do_sys_reboot+0x209/0x240 do_syscall_64+0x81/0x610 ? srso_return_thunk+0x5/0x5f ? __rtnl_unlock+0x37/0x70 ? srso_return_thunk+0x5/0x5f ? netdev_run_todo+0x63/0x570 ? netif_change_flags+0x54/0x70 ? srso_return_thunk+0x5/0x5f ? devinet_ioctl+0x1e5/0x790 ? srso_return_thunk+0x5/0x5f ? inet_ioctl+0x1e9/0x200 ? srso_return_thunk+0x5/0x5f ? srso_return_thunk+0x5/0x5f ? sock_do_ioctl+0x7d/0x130 ? srso_return_thunk+0x5/0x5f ? __x64_sys_ioctl+0x97/0xe0 ? srso_return_thunk+0x5/0x5f ? srso_return_thunk+0x5/0x5f ? do_syscall_64+0x23b/0x610 ? srso_return_thunk+0x5/0x5f ? put_user_ifreq+0x7a/0x90 ? srso_return_thunk+0x5/0x5f ? sock_do_ioctl+0x107/0x130 ? srso_return_thunk+0x5/0x5f ? __x64_sys_ioctl+0x97/0xe0 ? srso_return_thunk+0x5/0x5f ? do_syscall_64+0x81/0x610 ? srso_return_thunk+0x5/0x5f ? exc_page_fault+0x7e/0x1a0 entry_SYSCALL_64_after_hwframe+0x76/0x7e WARNING: include/drm/ttm/ttm_resource.h:406 at nouveau_ttm_fini+0x257/0x270= [nouveau], CPU#2: kexec/1300 Call Trace: nouveau_drm_device_fini+0x93/0x1f0 [nouveau c19e0da7fd83583a023f855c510d9a= 3903808734] nouveau_drm_shutdown+0x52/0xc0 [nouveau c19e0da7fd83583a023f855c510d9a3903= 808734] pci_device_shutdown+0x35/0x60 device_shutdown+0x11c/0x1b0 kernel_kexec+0x13a/0x160 __do_sys_reboot+0x209/0x240 do_syscall_64+0x81/0x610 ? srso_return_thunk+0x5/0x5f ? __rtnl_unlock+0x37/0x70 ? srso_return_thunk+0x5/0x5f ? netdev_run_todo+0x63/0x570 ? netif_change_flags+0x54/0x70 ? srso_return_thunk+0x5/0x5f ? devinet_ioctl+0x1e5/0x790 ? srso_return_thunk+0x5/0x5f ? inet_ioctl+0x1e9/0x200 ? srso_return_thunk+0x5/0x5f ? srso_return_thunk+0x5/0x5f ? sock_do_ioctl+0x7d/0x130 ? srso_return_thunk+0x5/0x5f ? __x64_sys_ioctl+0x97/0xe0 ? srso_return_thunk+0x5/0x5f ? srso_return_thunk+0x5/0x5f ? do_syscall_64+0x23b/0x610 ? srso_return_thunk+0x5/0x5f ? put_user_ifreq+0x7a/0x90 ? srso_return_thunk+0x5/0x5f ? sock_do_ioctl+0x107/0x130 ? srso_return_thunk+0x5/0x5f ? __x64_sys_ioctl+0x97/0xe0 ? srso_return_thunk+0x5/0x5f ? do_syscall_64+0x81/0x610 ? srso_return_thunk+0x5/0x5f ? exc_page_fault+0x7e/0x1a0 entry_SYSCALL_64_after_hwframe+0x76/0x7e Signed-off-by: Li Chen Reviewed-by: Dave Airlie --- drivers/gpu/drm/nouveau/nouveau_drm.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouvea= u/nouveau_drm.c index 1527b801f013..50384462723b 100644 --- a/drivers/gpu/drm/nouveau/nouveau_drm.c +++ b/drivers/gpu/drm/nouveau/nouveau_drm.c @@ -1079,6 +1079,29 @@ nouveau_pmops_resume(struct device *dev) return ret; } =20 +static void +nouveau_drm_shutdown(struct pci_dev *pdev) +{ + struct nouveau_drm *drm =3D pci_get_drvdata(pdev); + int ret; + + if (!drm) + return; + + if (drm->dev->switch_power_state =3D=3D DRM_SWITCH_POWER_OFF || + drm->dev->switch_power_state =3D=3D DRM_SWITCH_POWER_DYNAMIC_OFF) + return; + + ret =3D nouveau_do_suspend(drm, false); + if (ret) + NV_ERROR(drm, "shutdown suspend failed with: %d\n", ret); + + pci_save_state(pdev); + pci_disable_device(pdev); + pci_set_power_state(pdev, PCI_D3hot); + usleep_range(200, 400); +} + static int nouveau_pmops_freeze(struct device *dev) { @@ -1408,6 +1431,7 @@ nouveau_drm_pci_driver =3D { .id_table =3D nouveau_drm_pci_table, .probe =3D nouveau_drm_probe, .remove =3D nouveau_drm_remove, + .shutdown =3D nouveau_drm_shutdown, .driver.pm =3D &nouveau_pm_ops, }; =20 --=20 2.52.0