Input: return correct value when setting up absolute device via uinipt.

uinput_alloc_device() is supposed to return the number of bytes read,
the value is returned to uinput_write() and from there to userspace. If
EV_ABS is set then it returns the value from uinput_validate_absbits()
instead, which is zero when everything is ok instead of the count.

Signed-off-by: Ian Campbell <icampbell@arcom.com>
Acked-by: Aristeu Rozanski <aris@cathedrallabs.org>
Signed-off-by: Vojtech Pavlik <vojtech@suse.cz>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/input/misc/uinput.c b/drivers/input/misc/uinput.c
index 158c8e845ff9..98710997aaaa 100644
--- a/drivers/input/misc/uinput.c
+++ b/drivers/input/misc/uinput.c
@@ -298,9 +298,11 @@ static int uinput_alloc_device(struct file *file, const char __user *buffer, siz
         /* check if absmin/absmax/absfuzz/absflat are filled as
          * told in Documentation/input/input-programming.txt */
         if (test_bit(EV_ABS, dev->evbit)) {
-                retval = uinput_validate_absbits(dev);
-                if (retval < 0)
+                int err = uinput_validate_absbits(dev);
+                if (err < 0) {
+                        retval = err;
                         kfree(dev->name);
+                }
         }
 
 exit: