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Commit 1865a9c3 authored by Kulikov Vasiliy's avatar Kulikov Vasiliy Committed by Greg Kroah-Hartman
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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: default avatarKulikov Vasiliy <segooon@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 6d4d4554

drivers/usb/misc/adutux.c

+1 −1
Original line number Diff line number Diff line
@@ -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;

			}