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 949BE346AC6; Tue, 17 Mar 2026 16:58:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773766704; cv=none; b=g9T15eYEgy5WbiIPbkp+vpxeFmz/9SQXq7+81S9kw38beH+r6rlkIyBrbySNDqRxo+qV5lmQ5ZKRZk6s2jt22C5ijId1vtwCwyz30RIaUI4fkFiiXS1WLH3CvmO37wb1F6Ep/bPmJc+O/tuSzXqSsxjtc9oOfDk6joyBWNpqP+c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773766704; c=relaxed/simple; bh=6K45H4xOWJ+GmujoFNeapzqIQUG8znrJqo3j4Oo6KZo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=A59ZPVEVdAMcDZeXdG1IiwfCuqR8xcorO9AC3EXyBDfWbMs0PQW5YP/NjsG048F9KDagj5xgZJw6Cz65MoTJEOL8zQbI3t6gCGUbFiiB1iNy5BQd0VZt1OfkUHMgPmRn7aBeHCD1ajofEalfCPir8y/SaIBLAtGhoAW0KPzvciw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=IxunJo37; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="IxunJo37" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8B647C4CEF7; Tue, 17 Mar 2026 16:58:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1773766704; bh=6K45H4xOWJ+GmujoFNeapzqIQUG8znrJqo3j4Oo6KZo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IxunJo37I7+3spr0qdRaNyLO2cIw4yoZBcs3T69ba81yFeyVas5DorbIQOu9JoDeI 2HTSiJQoVnVj4QcTx9TW48h7quBwf3A6saP7gq5PB1GU8+S5blxjZhohAXdlwIPa7m 7GVIxb0vPG5xrqn6e+2fRICvio9g2x6hcVtmBL2I= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Lyude Paul , Dave Airlie , Danilo Krummrich Subject: [PATCH 6.19 271/378] nouveau/dpcd: return EBUSY for aux xfer if the device is asleep Date: Tue, 17 Mar 2026 17:33:48 +0100 Message-ID: <20260317163016.980717017@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260317163006.959177102@linuxfoundation.org> References: <20260317163006.959177102@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dave Airlie commit 8f3c6f08ababad2e3bdd239728cf66a9949446b4 upstream. If we have runtime suspended, and userspace wants to use /dev/drm_dp_* then just tell it the device is busy instead of crashing in the GSP code. WARNING: CPU: 2 PID: 565741 at drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r535/rpc.c:164 r535_gsp_msgq_wait+0x9a/0xb0 [nouveau] CPU: 2 UID: 0 PID: 565741 Comm: fwupd Not tainted 6.18.10-200.fc43.x86_64 #1 PREEMPT(lazy) Hardware name: LENOVO 20QTS0PQ00/20QTS0PQ00, BIOS N2OET65W (1.52 ) 08/05/2024 RIP: 0010:r535_gsp_msgq_wait+0x9a/0xb0 [nouveau] This is a simple fix to get backported. We should probably engineer a proper power domain solution to wake up devices and keep them awake while fw updates are happening. Cc: stable@vger.kernel.org Fixes: 8894f4919bc4 ("drm/nouveau: register a drm_dp_aux channel for each dp connector") Reviewed-by: Lyude Paul Signed-off-by: Dave Airlie Link: https://patch.msgid.link/20260224031750.791621-1-airlied@gmail.com Signed-off-by: Danilo Krummrich Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/nouveau/nouveau_connector.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/gpu/drm/nouveau/nouveau_connector.c +++ b/drivers/gpu/drm/nouveau/nouveau_connector.c @@ -1230,6 +1230,9 @@ nouveau_connector_aux_xfer(struct drm_dp u8 size = msg->size; int ret; + if (pm_runtime_suspended(nv_connector->base.dev->dev)) + return -EBUSY; + nv_encoder = find_encoder(&nv_connector->base, DCB_OUTPUT_DP); if (!nv_encoder) return -ENODEV;