If alloc() fails we let the frags linked list with garbage value (the
err ptr value) in its last element.
Reported-by: NMat Martineau <mathewm@codeaurora.org>
Signed-off-by: NGustavo Padovan <gustavo@padovan.org>
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>