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USB: adutux: fix misuse of return value of copy_to_user() 

copy_to_user() returns number of not copied bytes, not error code.

Signed-off-by: Kulikov Vasiliy <segooon@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
hifive-unleashed-5.1
Kulikov Vasiliy 2010-07-31 21:40:07 +04:00 committed by Greg Kroah-Hartman
parent 6d4d455486
commit 1865a9c382
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/misc/adutux.c
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@ -439,7 +439,7 @@ static ssize_t adu_read(struct file *file, __user char *buffer, size_t count,
/* drain secondary buffer */
int amount = bytes_to_read < data_in_secondary ? bytes_to_read : data_in_secondary;
i = copy_to_user(buffer, dev->read_buffer_secondary+dev->secondary_head, amount);
if (i < 0) {
if (i) {
retval = -EFAULT;
goto exit;
}