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[139.162.88.49]) by smtp.gmail.com with ESMTPSA id s68sm43510861pgc.5.2017.06.03.07.43.29 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Sat, 03 Jun 2017 07:43:33 -0700 (PDT) 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 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> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170603_074356_382951_BEEDCD98 X-CRM114-Status: GOOD ( 11.21 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Leo Yan MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP 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;