Hi all,

In a normal situation, I have something like this:

serial8250_interrupt()
serial8250_handle_port()
transmit_chars()
pass_counter: 0
serial8250_handle_port()
pass_counter: 1
serial8250_handle_port()
pass_counter: 2
pass_counter: 3


But when the problem happends:

serial8250_interrupt(16)
serial8250_handle_port()
transmit_chars()
uart_circ_empty()
pass_counter: 0
.
.
.
serial8250_handle_port()
transmit_chars()
uart_circ_empty()
pass_counter: 257
serial8250: too much work for irq16

If the circ buffer is empty, why iterate 256 times?

How can I trace the application that is calling serial routines?

Its difficult to debug cause I use serial console to communicate with the board.

Thanks in advance,

--
Alemao