Django View not returning httpresponse

I have the following code to handle a simple form, my view is not sending back an http response.

I can't figure out what's wrong with my code..

def novo_material(request):
current_page='material'
if request.method =='POST':
    form = SystemInventoryUpdate(request.POST)
    if form.is_valid():
        name=form.cleaned_data['name']
        qty=form.cleaned_data['qty']
        unit=form.cleaned_data['unit']
        t= NewMaterial(name=name,qty=qty,unit=unit)
        t.save()
        return HttpResponseRedirect(reverse('material'))
else:
    form=NewMaterial()
    return render(request,'novo_material.html',{'form':form})

It is raising this error:

The view dashboard.views.novo_material didn't return an HttpResponse object. It returned None instead.