From: Min Zhang
A race condition can clear tty ldisc icanon bit unintentionally which
could stop n_tty from processing received characters. It can occur when
tty receiver buffer was full, e.g. 4096 chars received, 8250 serial driver
interrupt tried to flush_to_ldisc them, but other shell thread
es from an hour to days to reproduce by
pumping inputs to serial console continously using TeraTerm script:
Signed-off-by: Min Zhang
---
drivers/tty/serial/8250/8250.c | 50
1 files changed, 50 insertions(+), 0 deletions(-)
diff --git a/drivers/tty/serial
On Fri, Oct 26, 2012 at 7:19 AM, Alan Cox wrote:
> So we only need to check this in serial8250_handle_irq when IIR indicates
> a data timeout interrupt ?
>
> Can we do
>
> if ((iir & 0x0F) == 0x0C) {
> /* Expensive RDI check */
> }
>
>
>
> Alan
Checking data timeo
On Tue, Oct 23, 2012 at 3:01 AM, Alan Cox wrote:
>
> > Added module parameter skip_rdi_check to opt out this workaround.
>
> NAK. Anything like this should be runtime.
One can echo 1 (or 0) > /sys/modules/8250/parameters/skip_rdi_check
during run time to turn it off (or on) dynamically. Does it c
The patch works around two UART interrupt bugs when the serial console is
flooded with inputs:
1. syslog shows "serial8250: too much works for irq"
2. serial console stops responding to key stroke
serial8250_handle_irq() checks UART_IIR_RDI before reading receive fifo
and clears bogus interrupt
On Fri, 5 Oct 2012, Ben Hutchings wrote:
> On Fri, 2012-10-05 at 11:28 -0700, Min Zhang wrote:
> > ifconfig mlx4_en port reported RUNNING even though the link was down.
> >
> > mlx4_en_init_netdev didn't initialize the dev operstate properly so
> >
re is no RUNNING status.
Signed-off-by: Min Zhang
---
drivers/net/ethernet/mellanox/mlx4/en_netdev.c |2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
index c96113b..8c562f7a 1006
tures
Signed-off-by: Min Zhang <[EMAIL PROTECTED]>
Index: rt-2.6/arch/ppc/kernel/traps.c
===
--- rt-2.6.orig/arch/ppc/kernel/traps.c
+++ rt-2.6/arch/ppc/kernel/traps.c
@@ -92,6 +92,7 @@ int die(const char * str, struct pt_regs
tk in module_init and insmod that kernel module. The
printk is in non-preemptive context because modules are loaded from
inside a realtime priority thread in a preemptive realtime kernel.
Signed-off-by: Min Zhang <[EMAIL PROTECTED]>
Index: rt-2.6/kern
. Refer to Intel system programming guide Part 1 Section 7.8.5
http://developer.intel.com/design/processor/manuals/253668.pdf
Signed-off-by: Min Zhang <[EMAIL PROTECTED]>
Index: linux-2.6.24-rc5/arch/x86/kernel/cpu/mchec
10 matches
Mail list logo
