From: Arnaud POULIQUEN <arnaud.pouliquen@foss.st.com>
To: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Ohad Ben-Cohen <ohad@wizery.com>,
Mathieu Poirier <mathieu.poirier@linaro.org>,
Andy Gross <agross@kernel.org>,
<linux-remoteproc@vger.kernel.org>,
<linux-kernel@vger.kernel.org>,
<linux-stm32@st-md-mailman.stormreply.com>,
<linux-arm-msm@vger.kernel.org>
Subject: Re: [PATCH v2 07/16] rpmsg: char: clean up rpmsg class
Date: Tue, 5 Jan 2021 18:03:20 +0100 [thread overview]
Message-ID: <813bf9dd-e189-66cc-83c1-775270561019@foss.st.com> (raw)
In-Reply-To: <X/O4rZfY74ryFQK4@builder.lan>
On 1/5/21 1:54 AM, Bjorn Andersson wrote:
> On Mon 04 Jan 18:47 CST 2021, Bjorn Andersson wrote:
>
>> On Tue 22 Dec 04:57 CST 2020, Arnaud Pouliquen wrote:
>>
>> This patch doesn't "clean up" the class, as described in $subject. It
>> just removes it.
>>
>>> Suppress the management of the rpmsg class as attribute. It is already
>>> handled in /sys/bus rpmsg as specified in
>>> documentation/ABI/testing/sysfs-bus-rpmsg.
>>
>> Afaict it doesn't relate to /sys/bus/rpmsg, but rather what attributes
>> should be associated with the rpmsg_device (and thereby present in its
>> sysfs directory). But if these attributes are also added by the bus,
>> then why do we have this code? If that's the case this seems like a nice
>> cleanup that we should do outside/before merging the other patches.
>>
>>> This patch prepares the migration of the control device in rpmsg_ctrl.
>>>
>>
>> It would be useful if the commit message described how it prepares for
>> the migration and why.
>>
>
> Now I see what this patch does, it removes the attributes from the
> character device's struct device, because they are provided by the
> struct rpmsg_device's bus!
>
> I wish your commit message made this obvious.
>
> Also, this implies that for a few patches here rpmsg_char is just
> broken - which I don't like.
I will move this patch at the end of the series and clarify commit message
Thanks
Arnaud
>
> Regards,
> Bjorn
>
>> Regards,
>> Bjorn
>>
>>> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
>>> ---
>>> drivers/rpmsg/rpmsg_char.c | 48 --------------------------------------
>>> 1 file changed, 48 deletions(-)
>>>
>>> diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c
>>> index 4bbbacdbf3bb..732f5caf068a 100644
>>> --- a/drivers/rpmsg/rpmsg_char.c
>>> +++ b/drivers/rpmsg/rpmsg_char.c
>>> @@ -27,7 +27,6 @@
>>> #define RPMSG_DEV_MAX (MINORMASK + 1)
>>>
>>> static dev_t rpmsg_major;
>>> -static struct class *rpmsg_class;
>>>
>>> static DEFINE_IDA(rpmsg_ctrl_ida);
>>> static DEFINE_IDA(rpmsg_ept_ida);
>>> @@ -291,41 +290,6 @@ static const struct file_operations rpmsg_eptdev_fops = {
>>> .compat_ioctl = compat_ptr_ioctl,
>>> };
>>>
>>> -static ssize_t name_show(struct device *dev, struct device_attribute *attr,
>>> - char *buf)
>>> -{
>>> - struct rpmsg_eptdev *eptdev = dev_get_drvdata(dev);
>>> -
>>> - return sprintf(buf, "%s\n", eptdev->chinfo.name);
>>> -}
>>> -static DEVICE_ATTR_RO(name);
>>> -
>>> -static ssize_t src_show(struct device *dev, struct device_attribute *attr,
>>> - char *buf)
>>> -{
>>> - struct rpmsg_eptdev *eptdev = dev_get_drvdata(dev);
>>> -
>>> - return sprintf(buf, "%d\n", eptdev->chinfo.src);
>>> -}
>>> -static DEVICE_ATTR_RO(src);
>>> -
>>> -static ssize_t dst_show(struct device *dev, struct device_attribute *attr,
>>> - char *buf)
>>> -{
>>> - struct rpmsg_eptdev *eptdev = dev_get_drvdata(dev);
>>> -
>>> - return sprintf(buf, "%d\n", eptdev->chinfo.dst);
>>> -}
>>> -static DEVICE_ATTR_RO(dst);
>>> -
>>> -static struct attribute *rpmsg_eptdev_attrs[] = {
>>> - &dev_attr_name.attr,
>>> - &dev_attr_src.attr,
>>> - &dev_attr_dst.attr,
>>> - NULL
>>> -};
>>> -ATTRIBUTE_GROUPS(rpmsg_eptdev);
>>> -
>>> static void rpmsg_eptdev_release_device(struct device *dev)
>>> {
>>> struct rpmsg_eptdev *eptdev = dev_to_eptdev(dev);
>>> @@ -358,9 +322,7 @@ static int rpmsg_eptdev_create(struct rpmsg_ctrldev *ctrldev,
>>> init_waitqueue_head(&eptdev->readq);
>>>
>>> device_initialize(dev);
>>> - dev->class = rpmsg_class;
>>> dev->parent = &ctrldev->dev;
>>> - dev->groups = rpmsg_eptdev_groups;
>>> dev_set_drvdata(dev, eptdev);
>>>
>>> cdev_init(&eptdev->cdev, &rpmsg_eptdev_fops);
>>> @@ -477,7 +439,6 @@ static int rpmsg_chrdev_probe(struct rpmsg_device *rpdev)
>>> dev = &ctrldev->dev;
>>> device_initialize(dev);
>>> dev->parent = &rpdev->dev;
>>> - dev->class = rpmsg_class;
>>>
>>> cdev_init(&ctrldev->cdev, &rpmsg_ctrldev_fops);
>>> ctrldev->cdev.owner = THIS_MODULE;
>>> @@ -553,17 +514,9 @@ static int rpmsg_char_init(void)
>>> return ret;
>>> }
>>>
>>> - rpmsg_class = class_create(THIS_MODULE, "rpmsg");
>>> - if (IS_ERR(rpmsg_class)) {
>>> - pr_err("failed to create rpmsg class\n");
>>> - unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX);
>>> - return PTR_ERR(rpmsg_class);
>>> - }
>>> -
>>> ret = register_rpmsg_driver(&rpmsg_chrdev_driver);
>>> if (ret < 0) {
>>> pr_err("rpmsgchr: failed to register rpmsg driver\n");
>>> - class_destroy(rpmsg_class);
>>> unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX);
>>> }
>>>
>>> @@ -574,7 +527,6 @@ postcore_initcall(rpmsg_char_init);
>>> static void rpmsg_chrdev_exit(void)
>>> {
>>> unregister_rpmsg_driver(&rpmsg_chrdev_driver);
>>> - class_destroy(rpmsg_class);
>>> unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX);
>>> }
>>> module_exit(rpmsg_chrdev_exit);
>>> --
>>> 2.17.1
>>>
next prev parent reply other threads:[~2021-01-05 17:04 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-22 10:57 [PATCH v2 00/16] introduce generic IOCTL interface for RPMsg channels management Arnaud Pouliquen
2020-12-22 10:57 ` [PATCH v2 01/16] rpmsg: introduce RPMsg control driver for channel creation Arnaud Pouliquen
2020-12-22 16:45 ` Randy Dunlap
2021-01-05 0:21 ` Bjorn Andersson
2021-01-21 23:31 ` Mathieu Poirier
2020-12-22 10:57 ` [PATCH v2 02/16] rpmsg: add RPMsg control API to register service Arnaud Pouliquen
2021-01-05 0:34 ` Bjorn Andersson
2021-01-05 16:53 ` Arnaud POULIQUEN
2021-01-21 23:46 ` Mathieu Poirier
2020-12-22 10:57 ` [PATCH v2 03/16] rpmsg: add override field in channel info Arnaud Pouliquen
2020-12-22 10:57 ` [PATCH v2 04/16] rpmsg: ctrl: implement the ioctl function to create device Arnaud Pouliquen
2021-01-05 1:33 ` Bjorn Andersson
2021-01-05 18:07 ` Arnaud POULIQUEN
2021-01-21 23:52 ` Mathieu Poirier
2021-01-22 13:05 ` Arnaud POULIQUEN
2021-01-22 20:59 ` Mathieu Poirier
2021-01-25 10:52 ` Arnaud POULIQUEN
2021-01-29 0:13 ` Mathieu Poirier
2021-01-29 9:45 ` Arnaud POULIQUEN
2020-12-22 10:57 ` [PATCH v2 05/16] rpmsg: ns: initialize channel info override field Arnaud Pouliquen
2021-01-05 0:38 ` Bjorn Andersson
2021-01-05 17:02 ` Arnaud POULIQUEN
2020-12-22 10:57 ` [PATCH v2 06/16] rpmsg: add helper to register the rpmsg ctrl device Arnaud Pouliquen
2020-12-22 10:57 ` [PATCH v2 07/16] rpmsg: char: clean up rpmsg class Arnaud Pouliquen
2021-01-05 0:47 ` Bjorn Andersson
2021-01-05 0:54 ` Bjorn Andersson
2021-01-05 17:03 ` Arnaud POULIQUEN [this message]
2020-12-22 10:57 ` [PATCH v2 08/16] rpmsg: char: make char rpmsg a rpmsg device without the control part Arnaud Pouliquen
2020-12-22 10:57 ` [PATCH v2 09/16] rpmsg: char: register RPMsg raw service to the ioctl interface Arnaud Pouliquen
2020-12-22 10:57 ` [PATCH v2 10/16] rpmsg: char: allow only one endpoint per device Arnaud Pouliquen
2021-01-05 0:59 ` Bjorn Andersson
2021-01-05 17:05 ` Arnaud POULIQUEN
2020-12-22 10:57 ` [PATCH v2 11/16] rpmsg: char: check destination address is not null Arnaud Pouliquen
2021-01-05 1:03 ` Bjorn Andersson
2021-01-05 17:08 ` Arnaud POULIQUEN
2020-12-22 10:57 ` [PATCH v2 12/16] rpmsg: virtio: use the driver_override in channel creation ops Arnaud Pouliquen
2020-12-22 10:57 ` [PATCH v2 13/16] rpmsg: virtio: probe the rpmsg_ctl device Arnaud Pouliquen
2020-12-29 4:16 ` kernel test robot
2021-01-04 12:59 ` Dan Carpenter
2020-12-22 10:57 ` [PATCH v2 14/16] rpmsg: glink: add create and release rpmsg channel ops Arnaud Pouliquen
2021-01-05 1:08 ` Bjorn Andersson
2021-01-05 17:29 ` Arnaud POULIQUEN
2020-12-22 10:57 ` [PATCH v2 15/16] rpmsg: smd: " Arnaud Pouliquen
2020-12-22 10:57 ` [PATCH v2 16/16] rpmsg: replace rpmsg_chrdev_register_device use Arnaud Pouliquen
2021-01-05 1:10 ` Bjorn Andersson
2021-01-04 23:03 ` [PATCH v2 00/16] introduce generic IOCTL interface for RPMsg channels management Bjorn Andersson
2021-01-05 16:59 ` Arnaud POULIQUEN
2021-01-13 20:31 ` Mathieu Poirier
2021-01-14 9:05 ` Arnaud POULIQUEN
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