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| author | Alexander Stein <alexander.stein@informatik.tu-chemnitz.de> | 2011-01-11 04:07:09 -0500 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2011-01-11 04:07:55 -0500 |
| commit | e1336bff92c6e0f4e6212af13f11d20c29a900a2 (patch) | |
| tree | 38b32eb929a00791986c1fafdb0d71e094c0a692 /Documentation/input/ff.txt | |
| parent | 5fca6cac9feed75efc0b2c454305a5f538d887f5 (diff) | |
Input: fix force feedback capability query example
'features' is a bit array, not byte array
Signed-off-by: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de>
Acked-by: Anssi Hannula <anssi.hannula@iki.fi>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'Documentation/input/ff.txt')
| -rw-r--r-- | Documentation/input/ff.txt | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/input/ff.txt b/Documentation/input/ff.txt index ded4d5f53109..b3867bf49f8f 100644 --- a/Documentation/input/ff.txt +++ b/Documentation/input/ff.txt | |||
| @@ -49,7 +49,9 @@ This information is subject to change. | |||
| 49 | #include <linux/input.h> | 49 | #include <linux/input.h> |
| 50 | #include <sys/ioctl.h> | 50 | #include <sys/ioctl.h> |
| 51 | 51 | ||
| 52 | unsigned long features[1 + FF_MAX/sizeof(unsigned long)]; | 52 | #define BITS_TO_LONGS(x) \ |
| 53 | (((x) + 8 * sizeof (unsigned long) - 1) / (8 * sizeof (unsigned long))) | ||
| 54 | unsigned long features[BITS_TO_LONGS(FF_CNT)]; | ||
| 53 | int ioctl(int file_descriptor, int request, unsigned long *features); | 55 | int ioctl(int file_descriptor, int request, unsigned long *features); |
| 54 | 56 | ||
| 55 | "request" must be EVIOCGBIT(EV_FF, size of features array in bytes ) | 57 | "request" must be EVIOCGBIT(EV_FF, size of features array in bytes ) |