Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751907AbdLUIVK (ORCPT ); Thu, 21 Dec 2017 03:21:10 -0500 Received: from mail-pl0-f67.google.com ([209.85.160.67]:44596 "EHLO mail-pl0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751685AbdLUIVE (ORCPT ); Thu, 21 Dec 2017 03:21:04 -0500 X-Google-Smtp-Source: ACJfBouyXSXXxVsG+1RkN2lV1F5Otr4UudASJpIS74O4Z8eZR0lnHtGWA52Nkpat/o2P8v639zKK2Q== From: Leo Yan To: Jonathan Corbet , Mathieu Poirier , Greg Kroah-Hartman , Will Deacon , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, coresight@lists.linaro.org Cc: Leo Yan Subject: [PATCH v3 5/6] coresight: Add and delete sink callback for panic kdump list Date: Thu, 21 Dec 2017 16:20:14 +0800 Message-Id: <1513844415-11427-6-git-send-email-leo.yan@linaro.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1513844415-11427-1-git-send-email-leo.yan@linaro.org> References: <1513844415-11427-1-git-send-email-leo.yan@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1350 Lines: 43 If the sink device has panic kdump callback, this means the sink device wants to save tracing data for panic happening. This commit adds node into panic kdump list when the sink device is enabled, and delete node when the sink device is disabled. Signed-off-by: Leo Yan --- drivers/hwtracing/coresight/coresight.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c index 389c4ba..56798b1 100644 --- a/drivers/hwtracing/coresight/coresight.c +++ b/drivers/hwtracing/coresight/coresight.c @@ -146,6 +146,14 @@ static int coresight_enable_sink(struct coresight_device *csdev, u32 mode) if (ret) return ret; } + + /* Add into panic kdump list */ + if (sink_ops(csdev)->panic_cb) { + ret = coresight_kdump_add(csdev, 0); + if (ret) + return ret; + } + csdev->enable = true; } @@ -157,6 +165,10 @@ static int coresight_enable_sink(struct coresight_device *csdev, u32 mode) static void coresight_disable_sink(struct coresight_device *csdev) { if (atomic_dec_return(csdev->refcnt) == 0) { + /* Delete from panic kdump list */ + if (sink_ops(csdev)->panic_cb) + coresight_kdump_del(csdev); + if (sink_ops(csdev)->disable) { sink_ops(csdev)->disable(csdev); csdev->enable = false; -- 2.7.4