{"id":2220542,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2220542/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-gpio/patch/20260407-swnode-unreg-retcode-v4-2-1b2f0725eb9c@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-v4-2-1b2f0725eb9c@oss.qualcomm.com>","date":"2026-04-07T13:27:58","name":"[v4,2/2] gpio: swnode: defer probe on references to unregistered software nodes","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"891b7458b00219d2feefb96174b9e9bc75e2257a","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-v4-2-1b2f0725eb9c@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/2220542/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2220542/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=eNC+pgOD;\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=K2w3wvpm;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c15:e001:75::12fc:5321; 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charset=\"utf-8\"","Content-Transfer-Encoding":"7bit","Message-Id":"<20260407-swnode-unreg-retcode-v4-2-1b2f0725eb9c@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=1448;\n i=bartosz.golaszewski@oss.qualcomm.com; h=from:subject:message-id;\n bh=OEfrFqY10EtQxTVjSrDWnxKhZ0dRAZ0uYSNJWN47ZEI=;\n b=owEBbQKS/ZANAwAKAQWdLsv/NoTDAcsmYgBp1QZlY5tTT9u7707SEUVxT4SUMKUdcSw8KweqE\n EqfOSvq9SOJAjMEAAEKAB0WIQSR5RMt5bVGHXuiZfwFnS7L/zaEwwUCadUGZQAKCRAFnS7L/zaE\n w86YD/0bskC9HEQp6u4n9iE5eHUdzj88nnBi8+E7bXgshffGQMjUkgQdC9LsraAR7ZsNIUUGMfv\n mvyn6HMSeU33eudv9g5ep7QGJlH7QPQKNgjTfhoJ55Ii/WHa+PVdzVESRDAGN7O7t58rW6SQDCy\n VngmqBnhvIg7oYlJPcbvJBqKJJNSidTDhk+DfHNvZnq2/mCsJGUDkUyglz5Q1WfT/CW3155Fz1U\n YBb0S+u+QMxbWG0Eh3MGovvhyGq3+0DpdQ6/i4N7f9jKcpyVLh1IhJvlyesswqzUH5S2wSpb859\n dcsgdTChI0yPEbV6K/lamQ1iC5MjvUZFciAYeApzYOwOzb8z0OT3RbFZDoWcFkUve/oJRYqpMaz\n nDSV/KCKDiH6Vq3EeO+2X47tjMrodSWhRAa/QTN3/hcl3ib3krTHyKhxIg9XdYq7ZI91ZRrSiio\n ra7IEuNGp9Pjhkc1RZlvf4UrRpoj5zX8uQ/R/OxTPro3H8m66SB1XJKtoCx8vdIfeYUEhvm3Vhj\n iqGRkBiquItARHAjuCPajV2OLCh7QSlf/fwQjwwxR0P3a5K/NX1rkEiDE8gwYX1WHVXbQLUHas9\n xO/ORkmqRvMAefGJztED0ifhQ420kzAkia2kShoCRRAFD9ukWUc3cJTzD4Ut3lrpfAlhES5bHA8\n 3tPRAH2wrClAw4A==","X-Developer-Key":"i=bartosz.golaszewski@oss.qualcomm.com; a=openpgp;\n fpr=169DEB6C0BC3C46013D2C79F11A72EA01471D772","X-Proofpoint-Spam-Details-Enc":"AW1haW4tMjYwNDA3MDEyNiBTYWx0ZWRfX7xdv6WUuUiEH\n yQF9If5BGe3fA2/XF1GR0C4DX7Ds7QfGGQvtLWik54cm0FV3tJdSF0UyXB9/RGAy22G4OQ/PfBW\n N21E0OWOC/8pNYEvykMTsBdbuVLLsBhQERLGiyf/s/m+LmNCUcwIvCstYIpTlXLcFW+5ntqtu7p\n 8Qwn24ndUoX1y2uRYpkPAdQQxvpLbzRQ3wXpKL6Hg1N4/gPo+edAr9zMwmDGJvBqzMh6gGZluGE\n A4h8orlNyyQOjtH5kYLJSa8rXqaqJjZ4g4ETVj7Gs+Zu3xQGwfJKKWh6N1o+YKjhp45OEpV83xC\n TNdZFnlZZtCcQWluAz2UG/MRC+9H0Tyeg1H9h4WvxhJlTnYmirOQBqDqosfTMrkrV3q3j7Rw6eM\n Tp3lPqKSTepio/2/C9hVb1jSjgAsYT1LveCDdP0n4Rsvo649LG5Y0LQ0ZPYDuySaHJP48GP+K9C\n b1Y6UEdGZQFG8QVgsIw==","X-Proofpoint-GUID":"AHQKsuWCQJtZwtcEdumMiSd570yg3qs2","X-Authority-Analysis":"v=2.4 cv=XPUAjwhE c=1 sm=1 tr=0 ts=69d50671 cx=c_pps\n a=EVbN6Ke/fEF3bsl7X48z0g==: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=gowsoOTTUOVcmtlkKump:22 a=EUspDBNiAAAA:8\n a=H5P8rdbTNIBZEmRUth0A:9 a=QEXdDO2ut3YA:10 a=a_PwQJl-kcHnX1M80qC6:22","X-Proofpoint-ORIG-GUID":"AHQKsuWCQJtZwtcEdumMiSd570yg3qs2","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 malwarescore=0 suspectscore=0 priorityscore=1501 impostorscore=0\n clxscore=1015 adultscore=0 phishscore=0 bulkscore=0 spamscore=0\n lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc=\n route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604010000\n definitions=main-2604070126"},"content":"fwnode_property_get_reference_args() now returns -ENOTCONN when called\non a software node referencing another software node which has not yet\nbeen registered as a firmware node. It makes sense to defer probe in this\nsituation as the node will most likely be registered later on and we'll\nbe able to resolve the reference eventually. Change the behavior of\nswnode_find_gpio() to return -EPROBE_DEFER if the software node reference\nresolution returns -ENOTCONN.\n\nSigned-off-by: Bartosz Golaszewski \n---\n drivers/gpio/gpiolib-swnode.c | 8 ++++++++\n 1 file changed, 8 insertions(+)","diff":"diff --git a/drivers/gpio/gpiolib-swnode.c b/drivers/gpio/gpiolib-swnode.c\nindex 0d7f3f09a0b4bee0cf1bbdaa8b7b8ae4cd5de581..4374067f621ed782a7e1549f7b0b7e44eac04930 100644\n--- a/drivers/gpio/gpiolib-swnode.c\n+++ b/drivers/gpio/gpiolib-swnode.c\n@@ -93,6 +93,14 @@ struct gpio_desc *swnode_find_gpio(struct fwnode_handle *fwnode,\n \t\tret = swnode_gpio_get_reference(fwnode, propname, idx, &args);\n \t\tif (ret == 0)\n \t\t\tbreak;\n+\t\tif (ret == -ENOTCONN)\n+\t\t\t/*\n+\t\t\t * -ENOTCONN for a software node reference lookup means\n+\t\t\t * that a remote struct software_node exists but has\n+\t\t\t * not yet been registered as a firmware node. Defer\n+\t\t\t * until this happens.\n+\t\t\t */\n+\t\t\treturn ERR_PTR(-EPROBE_DEFER);\n \t}\n \tif (ret) {\n \t\tpr_debug(\"%s: can't parse '%s' property of node '%pfwP[%d]'\\n\",\n","prefixes":["v4","2/2"]}