Messages in this thread Patch in this message | | | From | Ryan Mallon <> | Subject | [PATCH 1/2] input: Return the number of bytes written so far on evdev write failure | Date | Wed, 18 Sep 2013 08:55:43 +1000 |
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If input_event_from_user() fails in evdev write() and at least one event has been written successfully then return the number of bytes written. If no events have been written, then the EFAULT error is returned.
Signed-off-by: Ryan Mallon <rmallon@gmail.com> --- drivers/input/evdev.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c index d2b34fb..b0dec2ba 100644 --- a/drivers/input/evdev.c +++ b/drivers/input/evdev.c @@ -437,7 +437,8 @@ static ssize_t evdev_write(struct file *file, const char __user *buffer, while (retval + input_event_size() <= count) { if (input_event_from_user(buffer + retval, &event)) { - retval = -EFAULT; + if (retval == 0) + retval = -EFAULT; goto out; } retval += input_event_size(); -- 1.7.9.7
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