On Thu, Mar 24, 2005 at 10:02:05PM +0300, Michael Tokarev wrote: > Found an interesting issue here. > > HP ProLiant ML150 box (dual xeon 2.4GHz) with intel > chipset (lspci output below) and NetMos PCI 9835 > Multi-I/O Controller. > > Boot with no fancy options on kernel command line. > > # cat /sys/bus/pci/devices/0000:01:00.0/irq > 11 > # modprobe 8250 > # setserial /dev/ttyS2 irq 11 port 0xa400 autoconfig > > the serial port does not work: close'int the file > after writing something stalls for a while, and nothing > gets written. Ok.
setserial shouldn't be used to configure PCI-based serial ports. It's expected to fail. 8) > # rmmod 8250 > # modprobe parport_pc > ACPI: PCI interrupt 0000:01:00.0[A] -> GSI 18 (level, low) -> IRQ 193 > # cat /sys/bus/pci/devices/0000:01:00.0/irq > 193 > # rmmod parport_pc # as it will conflict with 8250 here > # modprobe 8250 > # setserial /dev/ttyS2 irq 193 port 0xa400 autoconfig > > now the serial port works. That's because parport_pc seems to think it should be driving this combination serial/parallel device. That's actually something that parport_serial should be doing, and there's a patch in -mm to fix this: http://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.12-rc1/2.6.12-rc1-mm2/broken-out/netmos-parallel-serial-combo-support.patch However, this patch seems to claim that the 9835 is not supported by anything in the kernel at present, so how is parport_pc finding your card? Have you applied any patches? > BTW, we have another prob with this very Netmos card and this very > machine: sometimes, the whole machine hangs hard when using serial > driver, so only power button helps. Happens with 2.4.* kernels > (it assigns IRQ18 to the card) and with earlier 2.6.x kernels. > Dunno if the two are related. That's a separate problem. -- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of: 2.6 Serial core - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
