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| author | Ivan Orlov <ivan.orlov0322@gmail.com> | 2023-06-20 11:44:16 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-06-20 16:20:47 +0200 |
| commit | 2c10e7a049dad73503da41c7754add91cb7b35d9 (patch) | |
| tree | 34d07a11ba48662fb6905921b3536f32502bda8b /drivers | |
| parent | e571e843f0ce005503471707fa02e892ba2a6f35 (diff) | |
| download | linux-2c10e7a049dad73503da41c7754add91cb7b35d9.tar.gz linux-2c10e7a049dad73503da41c7754add91cb7b35d9.tar.bz2 linux-2c10e7a049dad73503da41c7754add91cb7b35d9.zip | |
USB: gadget: f_printer: make usb_gadget_class a static const structure
Now that the driver core allows for struct class to be in read-only
memory, move the usb_gadget_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/20230620094412.508580-10-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/gadget/function/f_printer.c | 25 |
1 files changed, 11 insertions, 14 deletions
diff --git a/drivers/usb/gadget/function/f_printer.c b/drivers/usb/gadget/function/f_printer.c index b91425611969..076dd4c1be96 100644 --- a/drivers/usb/gadget/function/f_printer.c +++ b/drivers/usb/gadget/function/f_printer.c @@ -54,7 +54,10 @@ #define DEFAULT_Q_LEN 10 /* same as legacy g_printer gadget */ static int major, minors; -static struct class *usb_gadget_class; +static const struct class usb_gadget_class = { + .name = "usb_printer_gadget", +}; + static DEFINE_IDA(printer_ida); static DEFINE_MUTEX(printer_ida_lock); /* protects access do printer_ida */ @@ -1120,7 +1123,7 @@ autoconf_fail: /* Setup the sysfs files for the printer gadget. */ devt = MKDEV(major, dev->minor); - pdev = device_create(usb_gadget_class, NULL, devt, + pdev = device_create(&usb_gadget_class, NULL, devt, NULL, "g_printer%d", dev->minor); if (IS_ERR(pdev)) { ERROR(dev, "Failed to create device: g_printer\n"); @@ -1143,7 +1146,7 @@ autoconf_fail: return 0; fail_cdev_add: - device_destroy(usb_gadget_class, devt); + device_destroy(&usb_gadget_class, devt); fail_rx_reqs: while (!list_empty(&dev->rx_reqs)) { @@ -1410,7 +1413,7 @@ static void printer_func_unbind(struct usb_configuration *c, dev = func_to_printer(f); - device_destroy(usb_gadget_class, MKDEV(major, dev->minor)); + device_destroy(&usb_gadget_class, MKDEV(major, dev->minor)); /* Remove Character Device */ cdev_del(&dev->printer_cdev); @@ -1512,19 +1515,14 @@ static int gprinter_setup(int count) int status; dev_t devt; - usb_gadget_class = class_create("usb_printer_gadget"); - if (IS_ERR(usb_gadget_class)) { - status = PTR_ERR(usb_gadget_class); - usb_gadget_class = NULL; - pr_err("unable to create usb_gadget class %d\n", status); + status = class_register(&usb_gadget_class); + if (status) return status; - } status = alloc_chrdev_region(&devt, 0, count, "USB printer gadget"); if (status) { pr_err("alloc_chrdev_region %d\n", status); - class_destroy(usb_gadget_class); - usb_gadget_class = NULL; + class_unregister(&usb_gadget_class); return status; } @@ -1540,6 +1538,5 @@ static void gprinter_cleanup(void) unregister_chrdev_region(MKDEV(major, 0), minors); major = minors = 0; } - class_destroy(usb_gadget_class); - usb_gadget_class = NULL; + class_unregister(&usb_gadget_class); } |