diff options
| author | Ingo Molnar <mingo@elte.hu> | 2009-02-26 13:02:23 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-02-26 13:02:23 +0100 |
| commit | 8e818179eb9e8f9e44d8410dd2a25077d026a08e (patch) | |
| tree | 7d08afd30c95c04129c20693d974a18799caeb5a /drivers/serial/8250.c | |
| parent | 742bd95ba96e19b3f7196c3a0834ebc17c8ba006 (diff) | |
| parent | ecc25fbd6b9e07b33895c61ddf84006b00f55d99 (diff) | |
| download | talos-obmc-linux-8e818179eb9e8f9e44d8410dd2a25077d026a08e.tar.gz talos-obmc-linux-8e818179eb9e8f9e44d8410dd2a25077d026a08e.zip | |
Merge branch 'x86/core' into perfcounters/core
Conflicts:
arch/x86/kernel/apic/apic.c
arch/x86/kernel/irqinit_32.c
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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 0d934bfbdd9b..b4b39811b445 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); /* |
