Skip to contentSkip to conversation

FAILED: patch "[PATCH] slimbus: qcom-ngd-ctrl: Fix up platform_driver registration" failed to apply to 6.6-stable tree

PATCH New [email protected] 2 participants 2 messages Jun 15 – Jun 17

Subsystems (3)
Stable branch Arm Qualcomm mailing list Serial low-power inter-chip media bus (SLIMbus)
lore
Share & tools
lore

[email protected]

author maintainer
#0 lore raw

The patch below does not apply to the 6.6-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y
git checkout FETCH_HEAD
git cherry-pick -x 8663e8334d7b6007f5d8a4e5dd270246f35107a6
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2026061517-legume-grieving-bb5f@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^..

Possible dependencies:

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 8663e8334d7b6007f5d8a4e5dd270246f35107a6 Mon Sep 17 00:00:00 2001
From: Bjorn Andersson <[email protected]>
Date: Sat, 30 May 2026 21:44:15 +0100
Subject: [PATCH] slimbus: qcom-ngd-ctrl: Fix up platform_driver registration

Device drivers should not invoke platform_driver_register()/unregister() in their probe and remove paths. They should further not rely on platform_driver_unregister() as their only means of "deleting" their child devices.

Introduce a helper to unregister the child device and move the platform_driver_register()/unregister() to module_init()/exit().

Fixes 917809e2280b ("slimbus: ngd: Add qcom SLIMBus NGD driver")
Cc [email protected]
Reviewed-by Dmitry Baryshkov <[email protected]>
Reviewed-by Mukesh Ojha <[email protected]>
Signed-off-by Bjorn Andersson <[email protected]>
Signed-off-by Srinivas Kandagatla <[email protected]>
Link https://patch.msgid.link/[email protected] open here
Signed-off-by Greg Kroah-Hartman <[email protected]>
drivers/slimbus/qcom-ngd-ctrl.c +33 -3
index 428266949fdd..47ba9fb34d25 100644
@@ -1560,6 +1560,13 @@ static int of_qcom_slim_ngd_register(struct device *parent,
 	return -ENODEV;
 }
 
+static void qcom_slim_ngd_unregister(struct qcom_slim_ngd_ctrl *ctrl)
+{
+	struct qcom_slim_ngd *ngd = ctrl->ngd;
+
+	platform_device_del(ngd->pdev);
+}
+
 static int qcom_slim_ngd_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;

@@ -1662,7 +1669,6 @@ static int qcom_slim_ngd_ctrl_probe(struct platform_device *pdev)
 		goto err_pdr_lookup;
 	}
 
-	platform_driver_register(&qcom_slim_ngd_driver);
 	return of_qcom_slim_ngd_register(dev, ctrl);
 
 err_pdr_alloc:

@@ -1676,7 +1682,9 @@ static int qcom_slim_ngd_ctrl_probe(struct platform_device *pdev)
 
 static void qcom_slim_ngd_ctrl_remove(struct platform_device *pdev)
 {
-	platform_driver_unregister(&qcom_slim_ngd_driver);
+	struct qcom_slim_ngd_ctrl *ctrl = platform_get_drvdata(pdev);
+
+	qcom_slim_ngd_unregister(ctrl);
 }
 
 static void qcom_slim_ngd_remove(struct platform_device *pdev)

@@ -1752,6 +1760,28 @@ static struct platform_driver qcom_slim_ngd_driver = {
 	},
 };
 
-module_platform_driver(qcom_slim_ngd_ctrl_driver);
+static int qcom_slim_ngd_init(void)
+{
+	int ret;
+
+	ret = platform_driver_register(&qcom_slim_ngd_driver);
+	if (ret)
+		return ret;
+
+	ret = platform_driver_register(&qcom_slim_ngd_ctrl_driver);
+	if (ret)
+		platform_driver_unregister(&qcom_slim_ngd_driver);
+
+	return ret;
+}
+
+static void qcom_slim_ngd_exit(void)
+{
+	platform_driver_unregister(&qcom_slim_ngd_ctrl_driver);
+	platform_driver_unregister(&qcom_slim_ngd_driver);
+}
+
+module_init(qcom_slim_ngd_init);
+module_exit(qcom_slim_ngd_exit);
 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("Qualcomm SLIMBus NGD controller");
maintainer
#1 lore raw

PATCH 1/1 slimbus: qcom-ngd-ctrl: Fix up platform_driver registration

From: Bjorn Andersson <[email protected]>

[ Upstream commit 8663e8334d7b6007f5d8a4e5dd270246f35107a6 ]

Device drivers should not invoke platform_driver_register()/unregister() in their probe and remove paths. They should further not rely on platform_driver_unregister() as their only means of "deleting" their child devices.

Introduce a helper to unregister the child device and move the platform_driver_register()/unregister() to module_init()/exit().

Fixes 917809e2280b ("slimbus: ngd: Add qcom SLIMBus NGD driver")
Cc [email protected]
Reviewed-by Dmitry Baryshkov <[email protected]>
Reviewed-by Mukesh Ojha <[email protected]>
Signed-off-by Bjorn Andersson <[email protected]>
Signed-off-by Srinivas Kandagatla <[email protected]>
Link https://patch.msgid.link/[email protected] open here
Signed-off-by Greg Kroah-Hartman <[email protected]>
Signed-off-by Sasha Levin <[email protected]>
---
 drivers/slimbus/qcom-ngd-ctrl.c | 36 ++++++++++++++++++++++++++++++---
 1 file changed, 33 insertions(+), 3 deletions(-)
drivers/slimbus/qcom-ngd-ctrl.c +33 -3
index d0d289c49c8d11..09b6f0c2bff3a7 100644
@@ -1564,6 +1564,13 @@ static int of_qcom_slim_ngd_register(struct device *parent,
 	return -ENODEV;
 }
 
+static void qcom_slim_ngd_unregister(struct qcom_slim_ngd_ctrl *ctrl)
+{
+	struct qcom_slim_ngd *ngd = ctrl->ngd;
+
+	platform_device_del(ngd->pdev);
+}
+
 static int qcom_slim_ngd_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;

@@ -1666,7 +1673,6 @@ static int qcom_slim_ngd_ctrl_probe(struct platform_device *pdev)
 		goto err_pdr_lookup;
 	}
 
-	platform_driver_register(&qcom_slim_ngd_driver);
 	return of_qcom_slim_ngd_register(dev, ctrl);
 
 err_pdr_alloc:

@@ -1680,7 +1686,9 @@ static int qcom_slim_ngd_ctrl_probe(struct platform_device *pdev)
 
 static int qcom_slim_ngd_ctrl_remove(struct platform_device *pdev)
 {
-	platform_driver_unregister(&qcom_slim_ngd_driver);
+	struct qcom_slim_ngd_ctrl *ctrl = platform_get_drvdata(pdev);
+
+	qcom_slim_ngd_unregister(ctrl);
 
 	return 0;
 }

@@ -1759,6 +1767,28 @@ static struct platform_driver qcom_slim_ngd_driver = {
 	},
 };
 
-module_platform_driver(qcom_slim_ngd_ctrl_driver);
+static int qcom_slim_ngd_init(void)
+{
+	int ret;
+
+	ret = platform_driver_register(&qcom_slim_ngd_driver);
+	if (ret)
+		return ret;
+
+	ret = platform_driver_register(&qcom_slim_ngd_ctrl_driver);
+	if (ret)
+		platform_driver_unregister(&qcom_slim_ngd_driver);
+
+	return ret;
+}
+
+static void qcom_slim_ngd_exit(void)
+{
+	platform_driver_unregister(&qcom_slim_ngd_ctrl_driver);
+	platform_driver_unregister(&qcom_slim_ngd_driver);
+}
+
+module_init(qcom_slim_ngd_init);
+module_exit(qcom_slim_ngd_exit);
 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("Qualcomm SLIMBus NGD controller");
Signature · 1 line
2.53.0