From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AB8JxZq1D6HP7JcheoBxxUx38Cs4TqnPhU3j0f8Y318P2RAQDrzRYCpUBtsPRljBEZ6Nu5tOjIII ARC-Seal: i=1; a=rsa-sha256; t=1526472331; cv=none; d=google.com; s=arc-20160816; b=ljXftigtj6tZnDI+R1EbdP2Up6epfUHjGSKp5vxgF+cxzvW8WjmHYCIm2KrVy9mxFl gdMgh7XUme6LxpineI7R6EwvrDV7QEMRjEWibk9/CDMOCmFwHSSmmo1yBKkHqCkEmBYd Zt27IH5I3obJNiUPXk2mWwmzHECjNVAiAignZB9fnLgbw3Uk3/qfBgghEM+DjzXOwPQT IvqMLAPrqKafrSMrxCgadu4NTJ5cF7+qyzRmDCZavfb7U8BKTWpOvCvMoyAo1eo4RuDS c6pi8qmZch7X2J+vC93JMarxFe/LxBGrZ0TTurLuMPP0yBRhY7VPsHBaTUIhcNR6eKEI JVRg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=references:in-reply-to:references:in-reply-to:message-id:date :subject:cc:to:from:arc-authentication-results; bh=l5JbfXSiu2lBDxjaLwPAjHcKQyXXJOBa7Wje581f21k=; b=E+YbjWEngk6DFja0iI4IxJiQH+Fn/5cXZ+C5mv5pm8KEhdhzAXNNSdeEdx1H9zL1NZ PmUkh0zFmc7wjdiAQUxbjw/9m5MbH77+hddslWkIZttZUeghe1/VFMizM+lh2ZkdKxf8 qzK3B0S7XcIWKuM33xGdlCCMch8a/wx8UeGxiiD4WN4/1CMWYPU64Ctl0rBArjpR7l38 rXNH7Vmw8nkgdD+Kc8YzEJe9Wu8k3s58CmLk7RWKGxF/mGklxpZmFM5CXbU+ncP7rai0 bDfoBa5zpXvyR9DOjS/C1b93DYfcNh46kj57BIW3r3G9wWLh+Hoj0maJ9+3r/MvLSKpc bknA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of flo@geekplace.eu designates 2a03:4000:6:3a8::1 as permitted sender) smtp.mailfrom=flo@geekplace.eu Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of flo@geekplace.eu designates 2a03:4000:6:3a8::1 as permitted sender) smtp.mailfrom=flo@geekplace.eu From: Florian Schmaus To: Greg Kroah-Hartman Cc: Florian Schmaus , linux-kernel@vger.kernel.org Subject: [PATCH v4 2/3] driver-core: record error on bus registration Date: Wed, 16 May 2018 14:05:26 +0200 Message-Id: <20180516120527.29403-3-flo@geekplace.eu> X-Mailer: git-send-email 2.16.1 In-Reply-To: <20180516120527.29403-1-flo@geekplace.eu> References: <20180516120527.29403-1-flo@geekplace.eu> In-Reply-To: <20180515135114.31939-1-flo@geekplace.eu> References: <20180515135114.31939-1-flo@geekplace.eu> X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1600538307840439356?= X-GMAIL-MSGID: =?utf-8?q?1600622251043557770?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: If bus_register() fails on a driver then record the error code so that it can be inspected later on. Signed-off-by: Florian Schmaus --- Notes: - Also record ENOMEM error if initial alloc fails drivers/base/bus.c | 2 ++ include/linux/device.h | 1 + 2 files changed, 3 insertions(+) diff --git a/drivers/base/bus.c b/drivers/base/bus.c index ef6183306b40..dce677dddba4 100644 --- a/drivers/base/bus.c +++ b/drivers/base/bus.c @@ -152,6 +152,7 @@ static void bus_release(struct kobject *kobj) kfree(priv); bus->p = NULL; + bus->bus_register_error = 0; } static struct kobj_type bus_ktype = { @@ -915,6 +916,7 @@ int bus_register(struct bus_type *bus) out: kfree(bus->p); bus->p = NULL; + bus->bus_register_error = retval; return retval; } EXPORT_SYMBOL_GPL(bus_register); diff --git a/include/linux/device.h b/include/linux/device.h index 0059b99e1f25..5b1f3c08bebe 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -135,6 +135,7 @@ struct bus_type { const struct iommu_ops *iommu_ops; struct subsys_private *p; + int bus_register_error; struct lock_class_key lock_key; bool force_dma; -- 2.16.1