From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 2539125B68D for ; Wed, 30 Apr 2025 12:57:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746017882; cv=none; b=HqNP4ew+3p+lO/n1y7coxuNMNQewp2AclbY5k5aVj4+QrAelHZxtIU0Jia3LqZdoR4+2qNcoTb4Mh2LrzhAirjbH9OVi4a1UPLUkSWHSufEixBFArQ4daPrjROXwmu8VDI8TU0BwN3EiubYmDVnVzK+Qk6FH/dY8s9tx4CeJHZM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746017882; c=relaxed/simple; bh=C7o8omRFWq4tRVxnvDIcMWxHM8hlKm5GEHJf5zm4A4Y=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=idsqM1sy5C24wlD9r9edRvAIi8Qf8co7iuK5MkM2iTqKgv3luIxBGzNcN2Hw/6nVngRlTh8NhuI0qr0FFzLf148kGXniDZXzGzGasLzMTK1JDpnIbastYTRcDW53oJNZM3p381wj9rvwZOZqBC1qzV3fBjeZQlmpUrVRqSPmYWs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 001CC106F; Wed, 30 Apr 2025 05:57:52 -0700 (PDT) Received: from localhost (e132581.arm.com [10.1.196.87]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id ADBDD3F5A1; Wed, 30 Apr 2025 05:57:58 -0700 (PDT) Date: Wed, 30 Apr 2025 13:57:56 +0100 From: Leo Yan To: Yabin Cui Cc: Suzuki K Poulose , Mike Leach , James Clark , Jie Gan , Alexander Shishkin , coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v5 2/2] coresight: core: Disable helpers for devices that fail to enable Message-ID: <20250430125756.GK551819@e132581.arm.com> References: <20250429231301.1952246-1-yabinc@google.com> <20250429231301.1952246-3-yabinc@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250429231301.1952246-3-yabinc@google.com> On Tue, Apr 29, 2025 at 04:13:00PM -0700, Yabin Cui wrote: > When enabling a SINK or LINK type coresight device fails, the > associated helpers should be disabled. > > Signed-off-by: Yabin Cui > Suggested-by: Suzuki K Poulose > Reviewed-by: James Clark > Reviewed-by: Mike Leach Reviewed-by: Leo Yan > --- > drivers/hwtracing/coresight/coresight-core.c | 15 ++++++++++----- > 1 file changed, 10 insertions(+), 5 deletions(-) > > diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtracing/coresight/coresight-core.c > index dabec7073aed..d3523f0262af 100644 > --- a/drivers/hwtracing/coresight/coresight-core.c > +++ b/drivers/hwtracing/coresight/coresight-core.c > @@ -465,7 +465,7 @@ int coresight_enable_path(struct coresight_path *path, enum cs_mode mode, > /* Enable all helpers adjacent to the path first */ > ret = coresight_enable_helpers(csdev, mode, path); > if (ret) > - goto err; > + goto err_disable_path; > /* > * ETF devices are tricky... They can be a link or a sink, > * depending on how they are configured. If an ETF has been > @@ -486,8 +486,10 @@ int coresight_enable_path(struct coresight_path *path, enum cs_mode mode, > * that need disabling. Disabling the path here > * would mean we could disrupt an existing session. > */ > - if (ret) > + if (ret) { > + coresight_disable_helpers(csdev, path); > goto out; > + } > break; > case CORESIGHT_DEV_TYPE_SOURCE: > /* sources are enabled from either sysFS or Perf */ > @@ -497,16 +499,19 @@ int coresight_enable_path(struct coresight_path *path, enum cs_mode mode, > child = list_next_entry(nd, link)->csdev; > ret = coresight_enable_link(csdev, parent, child, source); > if (ret) > - goto err; > + goto err_disable_helpers; > break; > default: > - goto err; > + ret = -EINVAL; > + goto err_disable_helpers; > } > } > > out: > return ret; > -err: > +err_disable_helpers: > + coresight_disable_helpers(csdev, path); > +err_disable_path: > coresight_disable_path_from(path, nd); > goto out; > } > -- > 2.49.0.967.g6a0df3ecc3-goog >