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GET /api/patches/2216848/?format=api
{ "id": 2216848, "url": "http://patchwork.ozlabs.org/api/patches/2216848/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-gpio/patch/20260327-gpio-kill-dev-sync-probe-v1-2-efac254f1a1d@oss.qualcomm.com/", "project": { "id": 42, "url": "http://patchwork.ozlabs.org/api/projects/42/?format=api", "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": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260327-gpio-kill-dev-sync-probe-v1-2-efac254f1a1d@oss.qualcomm.com>", "list_archive_url": null, "date": "2026-03-27T10:31:12", "name": "[2/4] gpio: aggregator: stop using dev-sync-probe", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "f63451680a2b64cca084f941d2c00de23435cc12", "submitter": { "id": 92196, "url": "http://patchwork.ozlabs.org/api/people/92196/?format=api", "name": "Bartosz Golaszewski", "email": "bartosz.golaszewski@oss.qualcomm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-gpio/patch/20260327-gpio-kill-dev-sync-probe-v1-2-efac254f1a1d@oss.qualcomm.com/mbox/", "series": [ { "id": 497743, "url": "http://patchwork.ozlabs.org/api/series/497743/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-gpio/list/?series=497743", "date": "2026-03-27T10:31:11", "name": "gpio: kill dev-sync-probe", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/497743/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2216848/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2216848/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linux-gpio+bounces-34245-incoming=patchwork.ozlabs.org@vger.kernel.org>", "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=SmWbzjcZ;\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=S8gzVmVE;\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": "\n <20260327-gpio-kill-dev-sync-probe-v1-2-efac254f1a1d@oss.qualcomm.com>", "References": "\n <20260327-gpio-kill-dev-sync-probe-v1-0-efac254f1a1d@oss.qualcomm.com>", "In-Reply-To": "\n <20260327-gpio-kill-dev-sync-probe-v1-0-efac254f1a1d@oss.qualcomm.com>", "To": "Linus Walleij <linusw@kernel.org>, Bartosz Golaszewski <brgl@kernel.org>,\n Geert Uytterhoeven <geert+renesas@glider.be>,\n Koichiro Den <koichiro.den@canonical.com>", "Cc": "linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org,\n Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>", "X-Mailer": "b4 0.14.2", "X-Developer-Signature": "v=1; a=openpgp-sha256; l=5044;\n i=bartosz.golaszewski@oss.qualcomm.com; h=from:subject:message-id;\n bh=cvNWbcJEPu+X1KGHjftcUVfo5YRpAWfGsNOyThkztWg=;\n b=owEBbQKS/ZANAwAKAQWdLsv/NoTDAcsmYgBpxlx7/LwnXz655ObLQ1uxB4C2yqxOC9hpMFgFZ\n FQSh4Sn4uqJAjMEAAEKAB0WIQSR5RMt5bVGHXuiZfwFnS7L/zaEwwUCacZcewAKCRAFnS7L/zaE\n w7K9D/9OPshfbXmeEOYpJy4frYd3hQfDF7xgiCMX4+XAL/LpWN+rvWWIls7yN+emtf9OAZ7IKpm\n Xoh3Grl56GxlBaDpSXfnCNOhIgHUJTgPVsnsGFwr57fz0mcZrRB4hrlu+bXZwXCQsG6raVFlqsv\n TmNBSjmH/7DSP71y7OmnC0ZU+KKr8wZo5O7p5U8xuhA36wzLPx5GgWkJo7PWIN//ie686kK/Fse\n WcDHRnAAn2/fUaE6WpeUz7wKTcwtQCavkhTRCa168yKWcrJ1Gpghrq7+lBVGHvd8EAJshd38KQH\n ie0P6LYygePSh1yWcRKpEwWLv0XFAFL90sG62NkcyEe0qeWg6kYcUgzOS797bmn2PUEQpF3cOpV\n nO2xU/JgVnP7k1JaOuLGIFhNehwvUsewV9k/On23skZxhGgwiuddBqE/AJ9YvMu/RTUHaX8tvxG\n /dYoiFalySxv1a4BbM4voU70I145sx7+8ZVmO0mCaO+VvbIcUKG2tZgIJEjepZsdiWNmqRlXTAi\n 9V9zVQgMt0AgOOhuUahmdjrC3YT0s3KkSwP8S5VL4idlhH8F1tBpgHPuMi9bBtjKP1JiuMZRcyY\n Cb7IwuaIo7dGR+SQG7HkZY3udgGCkoL7VonU5SXkMjpPLSWOERRfTxVH4XrSW/Fwd9xLwIeuYn7\n sFqe58CYYuURMeg==", "X-Developer-Key": "i=bartosz.golaszewski@oss.qualcomm.com; a=openpgp;\n fpr=169DEB6C0BC3C46013D2C79F11A72EA01471D772", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwMzI3MDA3NiBTYWx0ZWRfX2Pztm+cbfyQb\n hWR7CMG9EBF2gh5EQVpSzzp8atFVxdiNvtRwPYFEUqG6jePjeIFsZS0RIRrwiafDCNMn7H3w2I2\n qU0bk06sbBjlyZLJEY7Mxs9HF2fEwpI8IyomIkL+fcq88MJGBwMPMxDzcTC9enVOA9V1KlHBXlt\n oGhdb2cF3hfdxRtNM4n8D5rJSv7fnJW3ACKCUDDQoFw4BgM+XM9bvJXZx+DyA1PO3HvSEr4Tg1Y\n jNF30gPlSASb9LCh5XDeOF95K8WgDCMK+PI8WRia/CHhwpPoD0qTRSUO1clydHImIldl7urwEBA\n +3UzNCBprWpP1C9sSFDAmKdB1Ug00lbgdj430qve2XRva3JfrMiD24NyVMAeUP8zBtKpOeu6J6S\n q+RsW0IKvb1kgi2qrOJZJqJqRoReg0kA7iX0jt+I8u6cP9u4mb3nwyKph6IV8w7J5RABKMywtwk\n F4yI9hara/GdH9YbP3A==", "X-Proofpoint-ORIG-GUID": "c-Qb4Cx1W8wJI_Hw_7dALElEjzT2X2vn", "X-Authority-Analysis": "v=2.4 cv=BZrVE7t2 c=1 sm=1 tr=0 ts=69c65c85 cx=c_pps\n a=JIY1xp/sjQ9K5JH4t62bdg==:117 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10\n a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22\n a=u7WPNUs3qKkmUXheDGA7:22 a=ZpdpYltYx_vBUK5n70dp:22 a=EUspDBNiAAAA:8\n a=DQLobAsLdNT4mewj-18A:9 a=QEXdDO2ut3YA:10 a=tNoRWFLymzeba-QzToBc:22", "X-Proofpoint-GUID": "c-Qb4Cx1W8wJI_Hw_7dALElEjzT2X2vn", "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=2026-03-26_04,2026-03-26_01,2025-10-01_01", "X-Proofpoint-Spam-Details": "rule=outbound_notspam policy=outbound score=0\n suspectscore=0 lowpriorityscore=0 adultscore=0 priorityscore=1501 bulkscore=0\n phishscore=0 clxscore=1015 impostorscore=0 spamscore=0 malwarescore=0\n classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0\n reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603270076" }, "content": "dev-err-probe is an overengineered solution to a simple problem. Use a\ncombination of wait_for_probe() and device_is_bound() to synchronously\nwait for the platform device to probe.\n\nSigned-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>\n---\n drivers/gpio/Kconfig | 1 -\n drivers/gpio/gpio-aggregator.c | 38 +++++++++++++++++++++-----------------\n 2 files changed, 21 insertions(+), 18 deletions(-)", "diff": "diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig\nindex a603406cb2e53a89e1da6214a3c1c256d5246be7..09db777938f3723e5dbd895dd1b30d39a21a2da1 100644\n--- a/drivers/gpio/Kconfig\n+++ b/drivers/gpio/Kconfig\n@@ -1984,7 +1984,6 @@ menu \"Virtual GPIO drivers\"\n config GPIO_AGGREGATOR\n \ttristate \"GPIO Aggregator\"\n \tselect CONFIGFS_FS\n-\tselect DEV_SYNC_PROBE\n \thelp\n \t Say yes here to enable the GPIO Aggregator, which provides a way to\n \t aggregate existing GPIO lines into a new virtual GPIO chip.\ndiff --git a/drivers/gpio/gpio-aggregator.c b/drivers/gpio/gpio-aggregator.c\nindex 9adf3228c12a84e098ab7ffd543fcad58951ba99..5915209e1e2168b0932de4d16aff38074b889c2b 100644\n--- a/drivers/gpio/gpio-aggregator.c\n+++ b/drivers/gpio/gpio-aggregator.c\n@@ -32,8 +32,6 @@\n #include <linux/gpio/forwarder.h>\n #include <linux/gpio/machine.h>\n \n-#include \"dev-sync-probe.h\"\n-\n #define AGGREGATOR_MAX_GPIOS 512\n #define AGGREGATOR_LEGACY_PREFIX \"_sysfs\"\n \n@@ -42,7 +40,7 @@\n */\n \n struct gpio_aggregator {\n-\tstruct dev_sync_probe_data probe_data;\n+\tstruct platform_device *pdev;\n \tstruct config_group group;\n \tstruct gpiod_lookup_table *lookups;\n \tstruct mutex lock;\n@@ -135,7 +133,7 @@ static bool gpio_aggregator_is_active(struct gpio_aggregator *aggr)\n {\n \tlockdep_assert_held(&aggr->lock);\n \n-\treturn aggr->probe_data.pdev && platform_get_drvdata(aggr->probe_data.pdev);\n+\treturn aggr->pdev && platform_get_drvdata(aggr->pdev);\n }\n \n /* Only aggregators created via legacy sysfs can be \"activating\". */\n@@ -143,7 +141,7 @@ static bool gpio_aggregator_is_activating(struct gpio_aggregator *aggr)\n {\n \tlockdep_assert_held(&aggr->lock);\n \n-\treturn aggr->probe_data.pdev && !platform_get_drvdata(aggr->probe_data.pdev);\n+\treturn aggr->pdev && !platform_get_drvdata(aggr->pdev);\n }\n \n static size_t gpio_aggregator_count_lines(struct gpio_aggregator *aggr)\n@@ -909,6 +907,7 @@ static int gpio_aggregator_activate(struct gpio_aggregator *aggr)\n {\n \tstruct platform_device_info pdevinfo;\n \tstruct gpio_aggregator_line *line;\n+\tstruct platform_device *pdev;\n \tstruct fwnode_handle *swnode;\n \tunsigned int n = 0;\n \tint ret = 0;\n@@ -962,12 +961,23 @@ static int gpio_aggregator_activate(struct gpio_aggregator *aggr)\n \n \tgpiod_add_lookup_table(aggr->lookups);\n \n-\tret = dev_sync_probe_register(&aggr->probe_data, &pdevinfo);\n-\tif (ret)\n+\tpdev = platform_device_register_full(&pdevinfo);\n+\tif (IS_ERR(pdev)) {\n+\t\tret = PTR_ERR(pdev);\n \t\tgoto err_remove_lookup_table;\n+\t}\n \n+\twait_for_device_probe();\n+\tif (!device_is_bound(&pdev->dev)) {\n+\t\tret = -ENXIO;\n+\t\tgoto err_unregister_pdev;\n+\t}\n+\n+\taggr->pdev = pdev;\n \treturn 0;\n \n+err_unregister_pdev:\n+\tplatform_device_unregister(pdev);\n err_remove_lookup_table:\n \tkfree(aggr->lookups->dev_id);\n \tgpiod_remove_lookup_table(aggr->lookups);\n@@ -981,7 +991,8 @@ static int gpio_aggregator_activate(struct gpio_aggregator *aggr)\n \n static void gpio_aggregator_deactivate(struct gpio_aggregator *aggr)\n {\n-\tdev_sync_probe_unregister(&aggr->probe_data);\n+\tplatform_device_unregister(aggr->pdev);\n+\taggr->pdev = NULL;\n \tgpiod_remove_lookup_table(aggr->lookups);\n \tkfree(aggr->lookups->dev_id);\n \tkfree(aggr->lookups);\n@@ -1145,7 +1156,7 @@ gpio_aggregator_device_dev_name_show(struct config_item *item, char *page)\n \n \tguard(mutex)(&aggr->lock);\n \n-\tpdev = aggr->probe_data.pdev;\n+\tpdev = aggr->pdev;\n \tif (pdev)\n \t\treturn sysfs_emit(page, \"%s\\n\", dev_name(&pdev->dev));\n \n@@ -1322,7 +1333,6 @@ gpio_aggregator_make_group(struct config_group *group, const char *name)\n \t\treturn ERR_PTR(ret);\n \n \tconfig_group_init_type_name(&aggr->group, name, &gpio_aggregator_device_type);\n-\tdev_sync_probe_init(&aggr->probe_data);\n \n \treturn &aggr->group;\n }\n@@ -1471,12 +1481,6 @@ static ssize_t gpio_aggregator_new_device_store(struct device_driver *driver,\n \tscnprintf(name, sizeof(name), \"%s.%d\", AGGREGATOR_LEGACY_PREFIX, aggr->id);\n \tconfig_group_init_type_name(&aggr->group, name, &gpio_aggregator_device_type);\n \n-\t/*\n-\t * Since the device created by sysfs might be toggled via configfs\n-\t * 'live' attribute later, this initialization is needed.\n-\t */\n-\tdev_sync_probe_init(&aggr->probe_data);\n-\n \t/* Expose to configfs */\n \tres = configfs_register_group(&gpio_aggregator_subsys.su_group,\n \t\t\t\t &aggr->group);\n@@ -1495,7 +1499,7 @@ static ssize_t gpio_aggregator_new_device_store(struct device_driver *driver,\n \t\tgoto remove_table;\n \t}\n \n-\taggr->probe_data.pdev = pdev;\n+\taggr->pdev = pdev;\n \tmodule_put(THIS_MODULE);\n \treturn count;\n \n", "prefixes": [ "2/4" ] }