diff options
author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2009-03-13 21:44:51 +0000 |
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committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-03-13 21:44:51 +0000 |
commit | 97fb44eb6bc01f4ffed4300e475aa15e44877375 (patch) | |
tree | 481ed6efd0babe7185cae04f2fd295426b36411d /drivers/serial/8250.c | |
parent | e4707dd3e9d0cb57597b6568a5e51fea5d6fca41 (diff) | |
parent | 148854c65ea8046b045672fd49f4333aefaa3ab5 (diff) |
Merge branch 'for-rmk' of git://git.pengutronix.de/git/imx/linux-2.6 into devel
Conflicts:
arch/arm/mach-at91/gpio.c
Diffstat (limited to 'drivers/serial/8250.c')
-rw-r--r-- | drivers/serial/8250.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c index 0d934bfbdd9..b4b39811b44 100644 --- a/drivers/serial/8250.c +++ b/drivers/serial/8250.c @@ -2083,6 +2083,20 @@ static int serial8250_startup(struct uart_port *port) serial8250_set_mctrl(&up->port, up->port.mctrl); + /* Serial over Lan (SoL) hack: + Intel 8257x Gigabit ethernet chips have a + 16550 emulation, to be used for Serial Over Lan. + Those chips take a longer time than a normal + serial device to signalize that a transmission + data was queued. Due to that, the above test generally + fails. One solution would be to delay the reading of + iir. However, this is not reliable, since the timeout + is variable. So, let's just don't test if we receive + TX irq. This way, we'll never enable UART_BUG_TXEN. + */ + if (up->port.flags & UPF_NO_TXEN_TEST) + goto dont_test_tx_en; + /* * Do a quick test to see if we receive an * interrupt when we enable the TX irq. @@ -2102,6 +2116,7 @@ static int serial8250_startup(struct uart_port *port) up->bugs &= ~UART_BUG_TXEN; } +dont_test_tx_en: spin_unlock_irqrestore(&up->port.lock, flags); /* |