diff options
Diffstat (limited to 'sys/dev/altera/jtag_uart/altera_jtag_uart_cons.c')
| -rw-r--r-- | sys/dev/altera/jtag_uart/altera_jtag_uart_cons.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sys/dev/altera/jtag_uart/altera_jtag_uart_cons.c b/sys/dev/altera/jtag_uart/altera_jtag_uart_cons.c index ae8459713003..96d20ceb21f4 100644 --- a/sys/dev/altera/jtag_uart/altera_jtag_uart_cons.c +++ b/sys/dev/altera/jtag_uart/altera_jtag_uart_cons.c @@ -221,6 +221,9 @@ aju_cons_write(char ch) * disconnection. * * XXXRW: The polling delay may require tuning. + * + * XXXRW: Notice the inherent race with hardware: in clearing the + * bit, we may race with hardware setting the same bit. */ v = aju_cons_control_read(); if (v & ALTERA_JTAG_UART_CONTROL_AC) { |