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| author | David Herrmann <dh.herrmann@gmail.com> | 2013-09-09 18:33:54 +0200 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2013-09-26 11:03:29 +0200 |
| commit | 19872d20c890073c5207d9e02bb8f14d451a11eb (patch) | |
| tree | 7f83152f8b341304cf4134fe85ab50d349d15ab1 /include/linux/miscdevice.h | |
| parent | 84fca9f38c5d646e95cdeef70e41cf15db549b95 (diff) | |
| download | lwn-19872d20c890073c5207d9e02bb8f14d451a11eb.tar.gz lwn-19872d20c890073c5207d9e02bb8f14d451a11eb.zip | |
HID: uhid: allocate static minor
udev has this nice feature of creating "dead" /dev/<node> device-nodes if
it finds a devnode:<node> modalias. Once the node is accessed, the kernel
automatically loads the module that provides the node. However, this
requires udev to know the major:minor code to use for the node. This
feature was introduced by:
commit 578454ff7eab61d13a26b568f99a89a2c9edc881
Author: Kay Sievers <kay.sievers@vrfy.org>
Date: Thu May 20 18:07:20 2010 +0200
driver core: add devname module aliases to allow module on-demand auto-loading
However, uhid uses dynamic minor numbers so this doesn't actually work. We
need to load uhid to know which minor it's going to use.
Hence, allocate a static minor (just like uinput does) and we're good
to go.
Reported-by: Tom Gundersen <teg@jklm.no>
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'include/linux/miscdevice.h')
| -rw-r--r-- | include/linux/miscdevice.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/miscdevice.h b/include/linux/miscdevice.h index 09c2300ddb37..cb358355ef43 100644 --- a/include/linux/miscdevice.h +++ b/include/linux/miscdevice.h @@ -45,6 +45,7 @@ #define MAPPER_CTRL_MINOR 236 #define LOOP_CTRL_MINOR 237 #define VHOST_NET_MINOR 238 +#define UHID_MINOR 239 #define MISC_DYNAMIC_MINOR 255 struct device; |