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[68.147.0.187]) by smtp.gmail.com with ESMTPSA id c23sm20513453pgc.72.2021.02.01.15.44.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 01 Feb 2021 15:44:33 -0800 (PST) Date: Mon, 1 Feb 2021 16:44:31 -0700 From: Mathieu Poirier To: Anshuman Khandual Cc: linux-arm-kernel@lists.infradead.org, coresight@lists.linaro.org, suzuki.poulose@arm.com, mike.leach@linaro.org, lcherian@marvell.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH V3 02/14] coresight: Do not scan for graph if none is present Message-ID: <20210201234431.GC1475392@xps15> References: <1611737738-1493-1-git-send-email-anshuman.khandual@arm.com> <1611737738-1493-3-git-send-email-anshuman.khandual@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1611737738-1493-3-git-send-email-anshuman.khandual@arm.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jan 27, 2021 at 02:25:26PM +0530, Anshuman Khandual wrote: > From: Suzuki K Poulose > > If a graph node is not found for a given node, of_get_next_endpoint() > will emit the following error message : > > OF: graph: no port node found in / > > If the given component doesn't have any explicit connections (e.g, > ETE) we could simply ignore the graph parsing. > > Cc: Mathieu Poirier > Cc: Mike Leach > Signed-off-by: Suzuki K Poulose > Signed-off-by: Anshuman Khandual > --- > drivers/hwtracing/coresight/coresight-platform.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/drivers/hwtracing/coresight/coresight-platform.c b/drivers/hwtracing/coresight/coresight-platform.c > index 3629b78..c594f45 100644 > --- a/drivers/hwtracing/coresight/coresight-platform.c > +++ b/drivers/hwtracing/coresight/coresight-platform.c > @@ -90,6 +90,12 @@ static void of_coresight_get_ports_legacy(const struct device_node *node, > struct of_endpoint endpoint; > int in = 0, out = 0; > > + /* > + * Avoid warnings in of_graph_get_next_endpoint() > + * if the device doesn't have any graph connections > + */ > + if (!of_graph_is_present(node)) > + return; Reviewed-by: Mathieu Poirier > do { > ep = of_graph_get_next_endpoint(node, ep); > if (!ep) > -- > 2.7.4 >