{"id":2220543,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2220543/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-gpio/patch/20260407-swnode-unreg-retcode-v4-1-1b2f0725eb9c@oss.qualcomm.com/","project":{"id":42,"url":"http://patchwork.ozlabs.org/api/1.1/projects/42/?format=json","name":"Linux GPIO development","link_name":"linux-gpio","list_id":"linux-gpio.vger.kernel.org","list_email":"linux-gpio@vger.kernel.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20260407-swnode-unreg-retcode-v4-1-1b2f0725eb9c@oss.qualcomm.com>","date":"2026-04-07T13:27:57","name":"[v4,1/2] software node: return -ENOTCONN when referenced swnode is not registered yet","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"66be69d9ecd1582c3b84ce5c979b46b58a650a35","submitter":{"id":92196,"url":"http://patchwork.ozlabs.org/api/1.1/people/92196/?format=json","name":"Bartosz Golaszewski","email":"bartosz.golaszewski@oss.qualcomm.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-gpio/patch/20260407-swnode-unreg-retcode-v4-1-1b2f0725eb9c@oss.qualcomm.com/mbox/","series":[{"id":498983,"url":"http://patchwork.ozlabs.org/api/1.1/series/498983/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-gpio/list/?series=498983","date":"2026-04-07T13:27:56","name":"driver core: make references to unregistered software nodes a special case","version":4,"mbox":"http://patchwork.ozlabs.org/series/498983/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2220543/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2220543/checks/","tags":{},"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-gpio@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=qualcomm.com header.i=@qualcomm.com header.a=rsa-sha256\n header.s=qcppdkim1 header.b=MLfpq7QY;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com\n header.a=rsa-sha256 header.s=google header.b=Om5AgSl7;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.232.135.74; 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charset=\"utf-8\"","Content-Transfer-Encoding":"7bit","Message-Id":"<20260407-swnode-unreg-retcode-v4-1-1b2f0725eb9c@oss.qualcomm.com>","References":"<20260407-swnode-unreg-retcode-v4-0-1b2f0725eb9c@oss.qualcomm.com>","In-Reply-To":"\n <20260407-swnode-unreg-retcode-v4-0-1b2f0725eb9c@oss.qualcomm.com>","To":"Andy Shevchenko ,\n Daniel Scally ,\n Heikki Krogerus ,\n Sakari Ailus ,\n Greg Kroah-Hartman ,\n \"Rafael J. Wysocki\" , Danilo Krummrich ,\n Mika Westerberg ,\n Andy Shevchenko , Linus Walleij ,\n Hans de Goede ,\n =?utf-8?q?Ilpo_J=C3=A4rvinen?= ,\n Dmitry Torokhov , Len Brown ","Cc":"linux-acpi@vger.kernel.org, driver-core@lists.linux.dev,\n linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org,\n platform-driver-x86@vger.kernel.org, brgl@kernel.org,\n Bartosz Golaszewski ","X-Mailer":"b4 0.14.2","X-Developer-Signature":"v=1; a=openpgp-sha256; l=2195;\n i=bartosz.golaszewski@oss.qualcomm.com; h=from:subject:message-id;\n bh=hmYdGZ8QpnFOuKeBACyvFyEsCOerFDJssZtlQSsutkA=;\n b=owEBbQKS/ZANAwAKAQWdLsv/NoTDAcsmYgBp1QZkjA7X1+jc27SHeZAK7S1NEcKZXxUiPVu0U\n wtyyi+csk2JAjMEAAEKAB0WIQSR5RMt5bVGHXuiZfwFnS7L/zaEwwUCadUGZAAKCRAFnS7L/zaE\n w+leEACnZABJzFjgUe801nNvDd9J625XE4Ufxm6zNPtDSZPwoBpkoqY+sXqtHY9NWff2zOKp2gF\n WdCK5Q/REfC+Ha7bdGdeWeJ3yS/+Gj1IIOJCJIpMAsbZm2TIz13/l54D2Y8ihOQl65rBxRsEBwT\n A93IuL2OzHhqj/KS+DFfBhHsLy0WoJWw00e4hT/dA8eLNmVrA25vOEnGqfMFsiDS8U+zqYeKsBK\n UIAXYmjsJytLXtJguzC1JDWUf7qeGbFFmNwLEXQRY3KadwzqwISCItcIclLbuUB1DaKrCTA3FM8\n 6Yz5/OixAHYD6G/oGVL+PkAAw3KVIYc9fbNwR1JVaWOhRH4VbyBMK4bavqvPSoOUyAVwiydO6xZ\n icwm21qpZcx9GGu6l9A03Gy5xp4wt/LqMlWX+JB3qf5mZUYb5O9tS+xwWedQhxdxiwEPQ8WmhMf\n ejrRaRqxfFBrcUCZS7R1lp+n+BDPn7/6szRNq2uuia9j1+0IfbpRC2i+jc97MrHONK0ANMSydLT\n +MrMWPBfCOb5aSru7GnPiWST88G9KMhQ7gTezWVW4zPTCbXOGSGkar76Eg3kndXy/HL6QzgdTOT\n A/Yn8KiP2N/CeRwWJEJB73rzB80CytsMI4BCmCcoNZaIL43b2y19by6MejUBafCVCZikLuIA1H7\n 0I6tA1MR3U3qZPQ==","X-Developer-Key":"i=bartosz.golaszewski@oss.qualcomm.com; a=openpgp;\n fpr=169DEB6C0BC3C46013D2C79F11A72EA01471D772","X-Proofpoint-Spam-Details-Enc":"AW1haW4tMjYwNDA3MDEyNiBTYWx0ZWRfX+3s6Iq8f7g6p\n aiws63RePV1tVruqFLThsvUNZoN/eVy1fSdVGTLkU8SdRwnNcanr7iUs4//wiqzwBFLnE7iM4m2\n MrhVIaPKS6F9cH2VmhV6PxfyO6yqBrzNfT7K54cj7biOfc3fAOzouEskPwAQ2oP9QSGmjNmF08W\n VJbOLGKip06hTeJ5DBsIL5GZUn5osWiZbhvjgTPQQDu+iGRQv2nqaC9Y/kRWzi09xRb4V1YzBFb\n Lgf7I7AExk5kiO7zt9eMZsVdYYwqzlPgAgKMSjThtbfLsfFqKzrMtqsfDLK3DPv0qaSkBSV1n3L\n cIiXGvj2fPZ+wDqBRMrdVA7UrIIsKinM1yTpOSKq1hDRN4xSJoCiKg2K6YeFo3NZuXqnY6rW99S\n 6VL7jnx8I4db4Z2QTPbd1L6C0trUtpd7FWLeeqVIHEjJ4PJPjHNtpHLUuRkAJRSCqRIMu861qv4\n au//1i+xwCfqr7Ei/tA==","X-Proofpoint-ORIG-GUID":"vftpKH5c3LN4DhDVP_Ld9K3GZWF9Og2D","X-Authority-Analysis":"v=2.4 cv=WNZPmHsR c=1 sm=1 tr=0 ts=69d5066e cx=c_pps\n a=mPf7EqFMSY9/WdsSgAYMbA==:117 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10\n a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22\n a=u7WPNUs3qKkmUXheDGA7:22 a=Um2Pa8k9VHT-vaBCBUpS:22 a=VwQbUJbxAAAA:8\n a=EUspDBNiAAAA:8 a=75m2fMeJeqiFL9RjkDoA:9 a=QEXdDO2ut3YA:10\n a=dawVfQjAaf238kedN5IG:22","X-Proofpoint-GUID":"vftpKH5c3LN4DhDVP_Ld9K3GZWF9Og2D","X-Proofpoint-Virus-Version":"vendor=baseguard\n engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49\n definitions=2026-04-07_02,2026-04-07_02,2025-10-01_01","X-Proofpoint-Spam-Details":"rule=outbound_notspam policy=outbound score=0\n priorityscore=1501 bulkscore=0 phishscore=0 spamscore=0 impostorscore=0\n lowpriorityscore=0 suspectscore=0 clxscore=1015 malwarescore=0 adultscore=0\n classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0\n reason=mlx scancount=1 engine=8.22.0-2604010000 definitions=main-2604070126"},"content":"It's possible that at the time of resolving a reference to a remote\nsoftware node, the node we know exists is not yet registered as a full\nfirmware node. We currently return -ENOENT in this case but the same\nerror code is also returned in some other cases, like the reference\nproperty with given name not existing in the property list of the local\nsoftware node.\n\nIt makes sense to let users know that we're dealing with an unregistered\nsoftware node so that they can defer probe - the situation is somewhat\nsimilar to there existing a firmware node to which no device is bound\nyet - which is valid grounds for probe deferral. To that end: use\n-ENOTCONN to indicate the software node is \"not connected\".\n\nAcked-by: Andy Shevchenko \nSigned-off-by: Bartosz Golaszewski \n---\n drivers/base/property.c | 2 ++\n drivers/base/swnode.c | 2 +-\n 2 files changed, 3 insertions(+), 1 deletion(-)","diff":"diff --git a/drivers/base/property.c b/drivers/base/property.c\nindex 8d9a34be57fbf185e639c70cc4baae4510ba70ee..51394b7d44e31d0453e9c0084bb7ddb25b14a429 100644\n--- a/drivers/base/property.c\n+++ b/drivers/base/property.c\n@@ -594,6 +594,8 @@ EXPORT_SYMBOL_GPL(fwnode_property_match_property_string);\n *\t %-ENOENT when the index is out of bounds, the index has an empty\n *\t\t reference or the property was not found\n *\t %-EINVAL on parse error\n+ *\t %-ENOTCONN when the remote firmware node is a software node that\n+ *\t\t has not been registered as a firmware node yet\n */\n int fwnode_property_get_reference_args(const struct fwnode_handle *fwnode,\n \t\t\t\t const char *prop, const char *nargs_prop,\ndiff --git a/drivers/base/swnode.c b/drivers/base/swnode.c\nindex 51320837f3a9f1bf4f65aa161d9b941affc74936..61e73417aee89feb855b0f429e112ca0af78a003 100644\n--- a/drivers/base/swnode.c\n+++ b/drivers/base/swnode.c\n@@ -554,7 +554,7 @@ software_node_get_reference_args(const struct fwnode_handle *fwnode,\n \t\treturn -EINVAL;\n \n \tif (!refnode)\n-\t\treturn -ENOENT;\n+\t\treturn -ENOTCONN;\n \n \tif (nargs_prop) {\n \t\terror = fwnode_property_read_u32(refnode, nargs_prop, &nargs_prop_val);\n","prefixes":["v4","1/2"]}