tree 6036cab11ada53a9aee71a0368b3487e09d1305e
parent 0d4104e5760221547fad158bbbb655a4e4c22b50
author Shmulik Ladkani <shmulik.ladkani@ravellosystems.com> 1470130880 +0300
committer Paolo Bonzini <pbonzini@redhat.com> 1470242697 +0200

util: Fix assertion in iov_copy() upon zero 'bytes' and non-zero 'offset'

In cases where iov_copy() is passed with zero 'bytes' argument and a
non-zero 'offset' argument, nothing gets copied - as expected.

However no copy iterations are performed, so 'offset' is left
unaltered, leading to the final assert(offset == 0) to fail.

Instead, change the loop condition to continue as long as 'offset || bytes',
similar to other iov_* functions.

This ensures 'offset' gets zeroed (even if no actual copy is made),
unless it is beyond end of source iov - which is asserted.

Signed-off-by: Shmulik Ladkani <shmulik.ladkani@ravellosystems.com>
Message-Id: <1470130880-1050-1-git-send-email-shmulik.ladkani@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>