On Maw, 2006-05-09 at 19:55 -0700, Daniel Walker wrote:
> Fixes the following warning,
>
> drivers/ide/ide-tape.c: In function ‘idetape_copy_stage_from_user’:
> drivers/ide/ide-tape.c:2662: warning: ignoring return value of ‘copy_from_user’, declared with attribute warn_unused_result
> drivers/ide/ide-tape.c: In function ‘idetape_copy_stage_to_user’:
> count = min((unsigned int)(bh->b_size - atomic_read(&bh->b_count)), (unsigned int)n);
> - copy_from_user(bh->b_data + atomic_read(&bh->b_count), buf, count);
> + WARN_ON(copy_from_user(bh->b_data + atomic_read(&bh->b_count), buf, count));
So you want to let users spew all over the kernel log when a copy from
user fails. Either fix it properly or leave it alone. In this case its
actually quite hard to fix properly which is why it hasn't been done.
(POSIX doesn't require invalid addresses reliably report -EFAULT)
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