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Input: serio_raw - return proper result when serio_raw_write fails

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If serio_raw_write was always returning number of bytes successfully
sent to serio port and never signalled error condition to the caller.
Change it so that for completely failed transfers appropriate error
code returned to the caller (partially successful writes still return
number of bytes transferred).

Reported-by: Che-liang Chiou <clchiou@chromium.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Dmitry Torokhov 2012-01-10 00:45:12 -08:00
parent 0c62fbf600
commit 4fa0771138
1 changed files with 1 additions and 1 deletions
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2
drivers/input/serio/serio_raw.c
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@ -224,7 +224,7 @@ static ssize_t serio_raw_write(struct file *file, const char __user *buffer,
out:
mutex_unlock(&serio_raw_mutex);
return written;
return written ?: retval;
}
static unsigned int serio_raw_poll(struct file *file, poll_table *wait)