USB HID: add 'quirks' module parameter

Add a 'quirks' module parameter for the usbhid module, so users can
add or modify quirks at module load time.

Signed-off-by: Paul Walmsley <paul@booyaka.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
index bf118c05a62..91d610358d5 100644
--- a/drivers/hid/usbhid/hid-core.c
+++ b/drivers/hid/usbhid/hid-core.c
@@ -53,6 +53,13 @@ static unsigned int hid_mousepoll_interval;
 module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644);
 MODULE_PARM_DESC(mousepoll, "Polling interval of mice");
 
+/* Quirks specified at module load time */
+static char *quirks_param[MAX_USBHID_BOOT_QUIRKS] = { [ 0 ... (MAX_USBHID_BOOT_QUIRKS - 1) ] = NULL };
+module_param_array_named(quirks, quirks_param, charp, NULL, 0444);
+MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying "
+                " quirks=vendorID:productID:quirks"
+                " where vendorID, productID, and quirks are all in"
+                " 0x-prefixed hex");
 /*
  * Input submission and I/O error handler.
  */
@@ -1072,6 +1079,9 @@ static struct usb_driver hid_driver = {
 static int __init hid_init(void)
 {
         int retval;
+        retval = usbhid_quirks_init(quirks_param);
+        if (retval)
+                goto usbhid_quirks_init_fail;
         retval = hiddev_init();
         if (retval)
                 goto hiddev_init_fail;
@@ -1084,6 +1094,8 @@ static int __init hid_init(void)
 usb_register_fail:
         hiddev_exit();
 hiddev_init_fail:
+        usbhid_quirks_exit();
+usbhid_quirks_init_fail:
         return retval;
 }
 
@@ -1091,6 +1103,7 @@ static void __exit hid_exit(void)
 {
         usb_deregister(&hid_driver);
         hiddev_exit();
+        usbhid_quirks_exit();
 }
 
 module_init(hid_init);