> But, many drivers appear to call tty_flip_buffer_push() from an atomic > context. If that is done with tty->low_latency==1 it turns into a call > to flush_to_ldisc(), which then calls disc->ops->receive_buf(), which > must not be called from an atomic context. It's covered under "So don't do that then". > Is the low_latency flag being forced to 0 somewhere behind the scenes > when tty_flip_buffer_push() is being called from an atomic context? No. The driver authors are assumed to have a modicum of competence and if they don't usually a shower of lock debug messages enlightens appropriately. Alan -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
