lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20240410135942.61667-7-afd@ti.com>
Date: Wed, 10 Apr 2024 08:59:35 -0500
From: Andrew Davis <afd@...com>
To: Jassi Brar <jassisinghbrar@...il.com>, Hari Nagalla <hnagalla@...com>,
        Nick Saulnier <nsaulnier@...com>,
        Bjorn Andersson <andersson@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>
CC: <linux-remoteproc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Andrew
 Davis <afd@...com>
Subject: [PATCH v2 06/13] mailbox: omap: Remove device class

The driver currently creates a new device class "mbox". Then for each
mailbox adds a device to that class. This class provides no file
operations provided for any userspace users of this device class.
It may have been extended to be functional in our vendor tree at
some point, but that is not the case anymore, nor does it matter
for the upstream tree.

Remove this device class and related functions and variables.
This also allows us to switch to module_platform_driver() as
there is nothing left to do in module_init().

Signed-off-by: Andrew Davis <afd@...com>
---
 drivers/mailbox/omap-mailbox.c | 89 +---------------------------------
 1 file changed, 2 insertions(+), 87 deletions(-)

diff --git a/drivers/mailbox/omap-mailbox.c b/drivers/mailbox/omap-mailbox.c
index 4c673cb732ed1..ea467931faf46 100644
--- a/drivers/mailbox/omap-mailbox.c
+++ b/drivers/mailbox/omap-mailbox.c
@@ -87,7 +87,6 @@ struct omap_mbox_device {
 	u32 intr_type;
 	struct omap_mbox **mboxes;
 	struct mbox_controller controller;
-	struct list_head elem;
 };
 
 struct omap_mbox_fifo_info {
@@ -107,7 +106,6 @@ struct omap_mbox {
 	const char		*name;
 	int			irq;
 	struct omap_mbox_queue	*rxq;
-	struct device		*dev;
 	struct omap_mbox_device *parent;
 	struct omap_mbox_fifo	tx_fifo;
 	struct omap_mbox_fifo	rx_fifo;
@@ -116,10 +114,6 @@ struct omap_mbox {
 	bool			send_no_irq;
 };
 
-/* global variables for the mailbox devices */
-static DEFINE_MUTEX(omap_mbox_devices_lock);
-static LIST_HEAD(omap_mbox_devices);
-
 static unsigned int mbox_kfifo_size = CONFIG_OMAP_MBOX_KFIFO_SIZE;
 module_param(mbox_kfifo_size, uint, S_IRUGO);
 MODULE_PARM_DESC(mbox_kfifo_size, "Size of omap's mailbox kfifo (bytes)");
@@ -395,61 +389,6 @@ static struct omap_mbox *omap_mbox_device_find(struct omap_mbox_device *mdev,
 	return mbox;
 }
 
-static struct class omap_mbox_class = { .name = "mbox", };
-
-static int omap_mbox_register(struct omap_mbox_device *mdev)
-{
-	int ret;
-	int i;
-	struct omap_mbox **mboxes;
-
-	if (!mdev || !mdev->mboxes)
-		return -EINVAL;
-
-	mboxes = mdev->mboxes;
-	for (i = 0; mboxes[i]; i++) {
-		struct omap_mbox *mbox = mboxes[i];
-
-		mbox->dev = device_create(&omap_mbox_class, mdev->dev,
-					0, mbox, "%s", mbox->name);
-		if (IS_ERR(mbox->dev)) {
-			ret = PTR_ERR(mbox->dev);
-			goto err_out;
-		}
-	}
-
-	mutex_lock(&omap_mbox_devices_lock);
-	list_add(&mdev->elem, &omap_mbox_devices);
-	mutex_unlock(&omap_mbox_devices_lock);
-
-	ret = devm_mbox_controller_register(mdev->dev, &mdev->controller);
-
-err_out:
-	if (ret) {
-		while (i--)
-			device_unregister(mboxes[i]->dev);
-	}
-	return ret;
-}
-
-static int omap_mbox_unregister(struct omap_mbox_device *mdev)
-{
-	int i;
-	struct omap_mbox **mboxes;
-
-	if (!mdev || !mdev->mboxes)
-		return -EINVAL;
-
-	mutex_lock(&omap_mbox_devices_lock);
-	list_del(&mdev->elem);
-	mutex_unlock(&omap_mbox_devices_lock);
-
-	mboxes = mdev->mboxes;
-	for (i = 0; mboxes[i]; i++)
-		device_unregister(mboxes[i]->dev);
-	return 0;
-}
-
 static int omap_mbox_chan_startup(struct mbox_chan *chan)
 {
 	struct omap_mbox *mbox = mbox_chan_to_omap_mbox(chan);
@@ -782,7 +721,7 @@ static int omap_mbox_probe(struct platform_device *pdev)
 	mdev->controller.chans = chnls;
 	mdev->controller.num_chans = info_count;
 	mdev->controller.of_xlate = omap_mbox_of_xlate;
-	ret = omap_mbox_register(mdev);
+	ret = devm_mbox_controller_register(mdev->dev, &mdev->controller);
 	if (ret)
 		return ret;
 
@@ -809,7 +748,6 @@ static int omap_mbox_probe(struct platform_device *pdev)
 
 unregister:
 	pm_runtime_disable(mdev->dev);
-	omap_mbox_unregister(mdev);
 	return ret;
 }
 
@@ -818,7 +756,6 @@ static void omap_mbox_remove(struct platform_device *pdev)
 	struct omap_mbox_device *mdev = platform_get_drvdata(pdev);
 
 	pm_runtime_disable(mdev->dev);
-	omap_mbox_unregister(mdev);
 }
 
 static struct platform_driver omap_mbox_driver = {
@@ -830,29 +767,7 @@ static struct platform_driver omap_mbox_driver = {
 		.of_match_table = of_match_ptr(omap_mailbox_of_match),
 	},
 };
-
-static int __init omap_mbox_init(void)
-{
-	int err;
-
-	err = class_register(&omap_mbox_class);
-	if (err)
-		return err;
-
-	err = platform_driver_register(&omap_mbox_driver);
-	if (err)
-		class_unregister(&omap_mbox_class);
-
-	return err;
-}
-subsys_initcall(omap_mbox_init);
-
-static void __exit omap_mbox_exit(void)
-{
-	platform_driver_unregister(&omap_mbox_driver);
-	class_unregister(&omap_mbox_class);
-}
-module_exit(omap_mbox_exit);
+module_platform_driver(omap_mbox_driver);
 
 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("omap mailbox: interrupt driven messaging");
-- 
2.39.2


Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ