Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751231AbdFCOnj (ORCPT ); Sat, 3 Jun 2017 10:43:39 -0400 Received: from mail-pg0-f48.google.com ([74.125.83.48]:33815 "EHLO mail-pg0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750765AbdFCOnf (ORCPT ); Sat, 3 Jun 2017 10:43:35 -0400 From: Leo Yan To: Mathieu Poirier , Will Deacon , Suzuki K Poulose , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Mike Leach , Chunyan Zhang Cc: Leo Yan Subject: [PATCH v1 2/4] coresight: add and remove panic callback for sink Date: Sat, 3 Jun 2017 22:42:54 +0800 Message-Id: <1496500976-18362-3-git-send-email-leo.yan@linaro.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1496500976-18362-1-git-send-email-leo.yan@linaro.org> References: <1496500976-18362-1-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: 1297 Lines: 40 If the sink device has panic callback function, add the panic callback node for coresight panic dump list when the sink device is enabled; also cleanup the node when the sink device is disabled. Signed-off-by: Leo Yan --- drivers/hwtracing/coresight/coresight.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c index 0c37356..5928886 100644 --- a/drivers/hwtracing/coresight/coresight.c +++ b/drivers/hwtracing/coresight/coresight.c @@ -138,6 +138,13 @@ static int coresight_enable_sink(struct coresight_device *csdev, u32 mode) if (ret) return ret; } + + /* Add kernel panic callback */ + if (sink_ops(csdev)->panic_cb) { + ret = coresight_add_panic_cb(csdev); + if (ret) + return ret; + } csdev->enable = true; } @@ -149,6 +156,10 @@ 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) { + /* Remove kernel panic callback */ + if (sink_ops(csdev)->panic_cb) + coresight_del_panic_cb(csdev); + if (sink_ops(csdev)->disable) { sink_ops(csdev)->disable(csdev); csdev->enable = false; -- 2.7.4