Revision 2198edddd8f0245d4c47419310c6cfb0f4e1a197 authored by Josh Boyer on 18 April 2012, 14:05:17 UTC, committed by Jiri Kosina on 19 April 2012, 12:16:43 UTC
Commit 4f5ca836b "HID: hid-input: add support for HID devices reporting Battery Strength" added the CONFIG_HID_BATTERY_STRENGTH option to report the battery strength of HID devices. The commit log explicitly mentions it not working properly with recent userspace, but it is default y anyway. This is rather odd, and actually causes problems on real systems. This works around Fedora bug https://bugzilla.redhat.com/show_bug.cgi?id=806295 Signed-off-by: Josh Boyer <jwboyer@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
1 parent 2cee571
devices.c
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
static int devinfo_show(struct seq_file *f, void *v)
{
int i = *(loff_t *) v;
if (i < CHRDEV_MAJOR_HASH_SIZE) {
if (i == 0)
seq_puts(f, "Character devices:\n");
chrdev_show(f, i);
}
#ifdef CONFIG_BLOCK
else {
i -= CHRDEV_MAJOR_HASH_SIZE;
if (i == 0)
seq_puts(f, "\nBlock devices:\n");
blkdev_show(f, i);
}
#endif
return 0;
}
static void *devinfo_start(struct seq_file *f, loff_t *pos)
{
if (*pos < (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
return pos;
return NULL;
}
static void *devinfo_next(struct seq_file *f, void *v, loff_t *pos)
{
(*pos)++;
if (*pos >= (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
return NULL;
return pos;
}
static void devinfo_stop(struct seq_file *f, void *v)
{
/* Nothing to do */
}
static const struct seq_operations devinfo_ops = {
.start = devinfo_start,
.next = devinfo_next,
.stop = devinfo_stop,
.show = devinfo_show
};
static int devinfo_open(struct inode *inode, struct file *filp)
{
return seq_open(filp, &devinfo_ops);
}
static const struct file_operations proc_devinfo_operations = {
.open = devinfo_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
static int __init proc_devices_init(void)
{
proc_create("devices", 0, NULL, &proc_devinfo_operations);
return 0;
}
module_init(proc_devices_init);
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