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Received: from foss.arm.com ([217.140.101.70]) by merlin.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hG486-0002hu-Ju for linux-arm-kernel@lists.infradead.org; Mon, 15 Apr 2019 16:06:47 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 76AFD1A25; Mon, 15 Apr 2019 09:06:46 -0700 (PDT) Received: from en101.cambridge.arm.com (en101.cambridge.arm.com [10.1.196.93]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id F11763F68F; Mon, 15 Apr 2019 09:06:44 -0700 (PDT) From: Suzuki K Poulose To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 35/36] [RFC] coresight: add return value for fixup connections Date: Mon, 15 Apr 2019 17:04:18 +0100 Message-Id: <1555344260-12375-36-git-send-email-suzuki.poulose@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1555344260-12375-1-git-send-email-suzuki.poulose@arm.com> References: <1555344260-12375-1-git-send-email-suzuki.poulose@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190415_120646_786912_E19EEF35 X-CRM114-Status: GOOD ( 15.67 ) 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: mathieu.poirier@linaro.org, Suzuki K Poulose , coresight@lists.linaro.org, rjw@rjwysocki.net, linux-kernel@vger.kernel.org, robert.walker@arm.com, mike.leach@linaro.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Handle failures in fixing up connections for a newly registered device. This will be useful to handle cases where we fail to expose the links via sysfs for the connections. Cc: Mathieu Poirier Signed-off-by: Suzuki K Poulose --- drivers/hwtracing/coresight/coresight.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c index 010bc86..4d63063 100644 --- a/drivers/hwtracing/coresight/coresight.c +++ b/drivers/hwtracing/coresight/coresight.c @@ -1025,18 +1025,18 @@ static int coresight_orphan_match(struct device *dev, void *data) return 0; } -static void coresight_fixup_orphan_conns(struct coresight_device *csdev) +static int coresight_fixup_orphan_conns(struct coresight_device *csdev) { /* * No need to check for a return value as orphan connection(s) * are hooked-up with each newly added component. */ - bus_for_each_dev(&coresight_bustype, NULL, + return bus_for_each_dev(&coresight_bustype, NULL, csdev, coresight_orphan_match); } -static void coresight_fixup_device_conns(struct coresight_device *csdev) +static int coresight_fixup_device_conns(struct coresight_device *csdev) { int i; @@ -1056,6 +1056,8 @@ static void coresight_fixup_device_conns(struct coresight_device *csdev) conn->child_dev = NULL; } } + + return 0; } static int coresight_remove_match(struct device *dev, void *data) @@ -1265,10 +1267,15 @@ struct coresight_device *coresight_register(struct coresight_desc *desc) mutex_lock(&coresight_mutex); - coresight_fixup_device_conns(csdev); - coresight_fixup_orphan_conns(csdev); + ret = coresight_fixup_device_conns(csdev); + if (!ret) + ret = coresight_fixup_orphan_conns(csdev); mutex_unlock(&coresight_mutex); + if (ret) { + coresight_unregister(csdev); + return ERR_PTR(ret); + } return csdev; -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel