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| author | Tero Saarni <tero.saarni@gmail.com> | 2009-06-10 23:27:24 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2009-06-19 22:55:17 -0700 |
| commit | ec20a022aa24fc63d3ab59584cb1e5aa9a21d46c (patch) | |
| tree | 671086529e62fcb541fb03422010d1eeae09b00a /drivers/input/evdev.c | |
| parent | d7ed5d883c09c5474f842dcb148515dfaef2a567 (diff) | |
| download | linux-ec20a022aa24fc63d3ab59584cb1e5aa9a21d46c.tar.bz2 | |
Input: synaptics - add support for reporting x/y resolution
Synaptics uses anisotropic coordinate system. On some wide touchpads
vertical resolution can be twice as high as horizontal which causes
unequal sensitivity on x/y directions. Add support for reading the
resolution with EVIOCGABS ioctl.
Signed-off-by: Tero Saarni <tero.saarni@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input/evdev.c')
| -rw-r--r-- | drivers/input/evdev.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c index c238116400b3..114efd8dc8f5 100644 --- a/drivers/input/evdev.c +++ b/drivers/input/evdev.c @@ -626,8 +626,11 @@ static long evdev_do_ioctl(struct file *file, unsigned int cmd, abs.maximum = dev->absmax[t]; abs.fuzz = dev->absfuzz[t]; abs.flat = dev->absflat[t]; + abs.resolution = dev->absres[t]; - if (copy_to_user(p, &abs, sizeof(struct input_absinfo))) + if (copy_to_user(p, &abs, min_t(size_t, + _IOC_SIZE(cmd), + sizeof(struct input_absinfo)))) return -EFAULT; return 0; @@ -654,8 +657,9 @@ static long evdev_do_ioctl(struct file *file, unsigned int cmd, t = _IOC_NR(cmd) & ABS_MAX; - if (copy_from_user(&abs, p, - sizeof(struct input_absinfo))) + if (copy_from_user(&abs, p, min_t(size_t, + _IOC_SIZE(cmd), + sizeof(struct input_absinfo)))) return -EFAULT; /* @@ -670,6 +674,8 @@ static long evdev_do_ioctl(struct file *file, unsigned int cmd, dev->absmax[t] = abs.maximum; dev->absfuzz[t] = abs.fuzz; dev->absflat[t] = abs.flat; + dev->absres[t] = _IOC_SIZE(cmd) < sizeof(struct input_absinfo) ? + 0 : abs.resolution; spin_unlock_irq(&dev->event_lock); |