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 43EAB183CDA; Tue, 30 Jul 2024 16:29:47 +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=1722356987; cv=none; b=F2peCwCvKCvyaQ8Jl2eY8ybnjWqn13sEWGLUv4RP25AavNtUz8EEHupXG3xLkKY5Ty9HN1xghtlM4+TJWkQK44GeRMA4WMIUbQCabYBtO2hpw4hFs9iyvmO9x0zMAcKUEpLGX23Ovwjh6zr2tjI4M+aGh6BjYkJkT9yYnPpwGfU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722356987; c=relaxed/simple; bh=e6K1RAuQ4jJOBa/AxAdjvIC9juVM++Q2iEe/avJhnpM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=kIT4K4vU2bjmhPh0GZ9ukN0+igCqvsCW1uDbncAqewdGesGFZy7nJgqJvjbeHFjDK9gyDR/Bsp//2+zaRmvM0LDDvX3FsG5O4bO3p6D3CkWYLxhCK4WujCjKkPQjd8WeQXcq/PhMrgXFmaH/Si57oCz0iNuAyyCCVWjZyCM7aCE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=U8lGujax; 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="U8lGujax" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C0D28C32782; Tue, 30 Jul 2024 16:29:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1722356987; bh=e6K1RAuQ4jJOBa/AxAdjvIC9juVM++Q2iEe/avJhnpM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=U8lGujax434IGAqa9+k9n9YGciYOjazAIdk1nSNBSJ7R5VIJhjme4t1XMNdX1kKMK DZHB7dCzFTpQwWMav+8ilaBcBqLkW3ir03GVu/awaetCcn+vyo/U5nS0xRbl75ew5D OV4xB8k+UY0nLqAQhoZ/Sv/ewy1JFZHpjwMslI4M= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Sean Anderson , Tomi Valkeinen , Sasha Levin Subject: [PATCH 6.6 207/568] drm: zynqmp_kms: Fix AUX bus not getting unregistered Date: Tue, 30 Jul 2024 17:45:14 +0200 Message-ID: <20240730151647.965772866@linuxfoundation.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240730151639.792277039@linuxfoundation.org> References: <20240730151639.792277039@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Sean Anderson [ Upstream commit 0743dafefd3f2b92116213f2225ea355001b7948 ] drm_encoder_cleanup is responsible for calling drm_bridge_detach for each bridge attached to the encoder. zynqmp_dp_bridge_detach is in turn responsible for unregistering the AUX bus. However, we never ended up calling drm_encoder_cleanup in the remove or error paths, so the AUX bus would stick around after the rest of the driver had been removed. I don't really understand why drm_mode_config_cleanup doesn't call drm_encoder_cleanup for us. It will call destroy (which for simple_encoder is drm_encoder_cleanup) on encoders in the mode_config's encoder_list. Should drm_encoder_cleanup get called before or after drm_atomic_helper_shutdown? Fixes: 2dfd045c8435 ("drm: xlnx: zynqmp_dpsub: Register AUX bus at bridge attach time") Signed-off-by: Sean Anderson Signed-off-by: Tomi Valkeinen Link: https://patchwork.freedesktop.org/patch/msgid/20240503192922.2172314-2-sean.anderson@linux.dev Signed-off-by: Sasha Levin --- drivers/gpu/drm/xlnx/zynqmp_kms.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/xlnx/zynqmp_kms.c b/drivers/gpu/drm/xlnx/zynqmp_kms.c index a7f8611be6f42..44d4a510ad7d6 100644 --- a/drivers/gpu/drm/xlnx/zynqmp_kms.c +++ b/drivers/gpu/drm/xlnx/zynqmp_kms.c @@ -434,23 +434,28 @@ static int zynqmp_dpsub_kms_init(struct zynqmp_dpsub *dpsub) DRM_BRIDGE_ATTACH_NO_CONNECTOR); if (ret) { dev_err(dpsub->dev, "failed to attach bridge to encoder\n"); - return ret; + goto err_encoder; } /* Create the connector for the chain of bridges. */ connector = drm_bridge_connector_init(&dpsub->drm->dev, encoder); if (IS_ERR(connector)) { dev_err(dpsub->dev, "failed to created connector\n"); - return PTR_ERR(connector); + ret = PTR_ERR(connector); + goto err_encoder; } ret = drm_connector_attach_encoder(connector, encoder); if (ret < 0) { dev_err(dpsub->dev, "failed to attach connector to encoder\n"); - return ret; + goto err_encoder; } return 0; + +err_encoder: + drm_encoder_cleanup(encoder); + return ret; } static void zynqmp_dpsub_drm_release(struct drm_device *drm, void *res) @@ -530,5 +535,6 @@ void zynqmp_dpsub_drm_cleanup(struct zynqmp_dpsub *dpsub) drm_dev_unregister(drm); drm_atomic_helper_shutdown(drm); + drm_encoder_cleanup(&dpsub->drm->encoder); drm_kms_helper_poll_fini(drm); } -- 2.43.0