From: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
To: "Andy Shevchenko" <andriy.shevchenko@linux.intel.com>,
"Daniel Scally" <djrscally@gmail.com>,
"Heikki Krogerus" <heikki.krogerus@linux.intel.com>,
"Sakari Ailus" <sakari.ailus@linux.intel.com>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Rafael J. Wysocki" <rafael@kernel.org>,
"Danilo Krummrich" <dakr@kernel.org>,
"Mika Westerberg" <mika.westerberg@linux.intel.com>,
"Andy Shevchenko" <andy@kernel.org>,
"Linus Walleij" <linusw@kernel.org>,
"Hans de Goede" <hansg@kernel.org>,
"Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>,
"Dmitry Torokhov" <dmitry.torokhov@gmail.com>,
"Len Brown" <lenb@kernel.org>
Cc: linux-acpi@vger.kernel.org, driver-core@lists.linux.dev,
linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org,
platform-driver-x86@vger.kernel.org, brgl@kernel.org,
Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Subject: [PATCH v2 1/4] software node: return -ENXIO when referenced swnode is not registered yet
Date: Thu, 02 Apr 2026 14:54:26 +0200 [thread overview]
Message-ID: <20260402-baytrail-real-swnode-v2-1-6f5054a4cc07@oss.qualcomm.com> (raw)
In-Reply-To: <20260402-baytrail-real-swnode-v2-0-6f5054a4cc07@oss.qualcomm.com>
It's possible that at the time of resolving a reference to a remote
software node, the node we know exists is not yet registered as a full
firmware node. We currently return -ENOENT in this case but the same
error code is also returned in some other cases, like the reference
property with given name not existing in the property list of the local
software node.
It makes sense to let users know that we're dealing with an unregistered
software node so that they can defer probe - the situation is somewhat
similar to there existing a firmware node to which no device is bound
yet - which is valid grounds for probe deferral. To that end: use -ENXIO
which stands for "No such device or address".
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
---
drivers/base/swnode.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/base/swnode.c b/drivers/base/swnode.c
index 51320837f3a9f1bf4f65aa161d9b941affc74936..29eec7ba500e8c8a02482dfac68f2c313cfadee7 100644
--- a/drivers/base/swnode.c
+++ b/drivers/base/swnode.c
@@ -554,7 +554,7 @@ software_node_get_reference_args(const struct fwnode_handle *fwnode,
return -EINVAL;
if (!refnode)
- return -ENOENT;
+ return -ENXIO;
if (nargs_prop) {
error = fwnode_property_read_u32(refnode, nargs_prop, &nargs_prop_val);
--
2.47.3
next prev parent reply other threads:[~2026-04-02 12:54 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-02 12:54 [PATCH v2 0/4] platform/x86: x86-android-tablets: use real firmware node references with intel drivers Bartosz Golaszewski
2026-04-02 12:54 ` Bartosz Golaszewski [this message]
2026-04-02 13:35 ` [PATCH v2 1/4] software node: return -ENXIO when referenced swnode is not registered yet Andy Shevchenko
2026-04-02 20:43 ` Dmitry Torokhov
2026-04-03 7:29 ` Bartosz Golaszewski
2026-04-03 18:07 ` Dmitry Torokhov
2026-04-07 10:57 ` Bartosz Golaszewski
2026-04-07 13:30 ` Bartosz Golaszewski
2026-04-07 13:59 ` Andy Shevchenko
2026-04-02 12:54 ` [PATCH v2 2/4] gpio: swnode: defer probe on references to unregistered software nodes Bartosz Golaszewski
2026-04-02 21:04 ` Dmitry Torokhov
2026-04-03 7:26 ` Bartosz Golaszewski
2026-04-03 13:44 ` Bartosz Golaszewski
2026-04-02 12:54 ` [PATCH v2 3/4] ACPI: bus: export the acpi_bus_type symbol Bartosz Golaszewski
2026-04-02 12:54 ` [PATCH v2 4/4] platform/x86: x86-android-tablets: enable fwnode matching of GPIO chips Bartosz Golaszewski
2026-04-04 18:25 ` Rafael J. Wysocki
2026-04-27 11:30 ` Bartosz Golaszewski
2026-04-02 13:23 ` [PATCH v2 0/4] platform/x86: x86-android-tablets: use real firmware node references with intel drivers Andy Shevchenko
2026-04-02 13:35 ` Bartosz Golaszewski
2026-04-02 13:47 ` Andy Shevchenko
2026-04-02 15:03 ` Bartosz Golaszewski
2026-04-02 16:05 ` Andy Shevchenko
2026-04-02 16:13 ` Bartosz Golaszewski
2026-04-02 16:18 ` Andy Shevchenko
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