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| author | Ivan Orlov <ivan.orlov0322@gmail.com> | 2023-06-20 11:44:17 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-06-20 16:20:48 +0200 |
| commit | 99f2d956e1fa3ead355cde4fd1a914e54cfe0a40 (patch) | |
| tree | 338cb298921f99ad9c29948e1ae192e0431e492f /drivers/usb | |
| parent | USB: gadget: f_printer: make usb_gadget_class a static const structure (diff) | |
| download | linux-99f2d956e1fa3ead355cde4fd1a914e54cfe0a40.tar.xz linux-99f2d956e1fa3ead355cde4fd1a914e54cfe0a40.zip | |
USB: gadget: f_hid: make hidg_class a static const structure
Now that the driver core allows for struct class to be in read-only
memory, move the hidg_class structure to be declared at build time
placing it into read-only memory, instead of having to be dynamically
allocated at load time.
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ivan Orlov <ivan.orlov0322@gmail.com>
Link: https://lore.kernel.org/r/20230620094412.508580-11-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/gadget/function/f_hid.c | 21 |
1 files changed, 10 insertions, 11 deletions
diff --git a/drivers/usb/gadget/function/f_hid.c b/drivers/usb/gadget/function/f_hid.c index 9f6b10134121..ea85e2c701a1 100644 --- a/drivers/usb/gadget/function/f_hid.c +++ b/drivers/usb/gadget/function/f_hid.c @@ -23,7 +23,11 @@ #define HIDG_MINORS 4 static int major, minors; -static struct class *hidg_class; + +static const struct class hidg_class = { + .name = "hidg", +}; + static DEFINE_IDA(hidg_ida); static DEFINE_MUTEX(hidg_ida_lock); /* protects access to hidg_ida */ @@ -1272,7 +1276,7 @@ static struct usb_function *hidg_alloc(struct usb_function_instance *fi) device_initialize(&hidg->dev); hidg->dev.release = hidg_release; - hidg->dev.class = hidg_class; + hidg->dev.class = &hidg_class; hidg->dev.devt = MKDEV(major, opts->minor); ret = dev_set_name(&hidg->dev, "hidg%d", opts->minor); if (ret) @@ -1325,17 +1329,13 @@ int ghid_setup(struct usb_gadget *g, int count) int status; dev_t dev; - hidg_class = class_create("hidg"); - if (IS_ERR(hidg_class)) { - status = PTR_ERR(hidg_class); - hidg_class = NULL; + status = class_register(&hidg_class); + if (status) return status; - } status = alloc_chrdev_region(&dev, 0, count, "hidg"); if (status) { - class_destroy(hidg_class); - hidg_class = NULL; + class_unregister(&hidg_class); return status; } @@ -1352,6 +1352,5 @@ void ghid_cleanup(void) major = minors = 0; } - class_destroy(hidg_class); - hidg_class = NULL; + class_unregister(&hidg_class); } |