Re: rocketport pci question... it stopped working after 250 days uptime

[Federico Grau <donfede@casagrau.org>]

Ok, 

I have another box which has had the same failure (rocketport serial ports
stoped working after 248 days and 16 hours).  I have about 2 more hours before
I need to reboot the box and get it back into production.

I have both a working and non-working example, where I have re-compiled and
re-loaded the rocketport module with the debugging info turned on.


On my working example:
    # when I load the module the init function gets called
        int rp_init(void)   

    # when I cat from the tty device the open function gets called
        static int rp_open(struct tty_struct *tty, struct file * filp) #
    
    # then somehow automagically the rp_handle_port() gets called by
    # rp_do_poll()... and data gets read
        void rp_handle_port(struct r_port *info)
        static void rp_do_poll(void)

On my non-working example:
    # the init and the open seem to hapen fine, however the rp_do_poll() never
    # gets called?!


I see that in rp_init(), rp_do_poll() gets saved to a "structure" called
"timer_table[COMTROL_TIMER].fn = rp_do_poll;", however I have yet to find what
that is.


Where else could I look to find the problem?

I am working with kernel 2.2.14 (/usr/src/linux/drivers/char/rocket.c), which
except for two lines is the same in 2.2.17.  I am not yet subscribed to the
kernel list, so please cc responses to me.

Thanks,
donfede

On Thu, Nov 30, 2000 at 03:27:49AM +0000, Alan Cox wrote:
> > These three boxes had similar uptimes (since their last kernel rebuild); 249
> > days, 248 days, 250 days.  Comparing the logs of each box, we saw that each
> > box's rocketport stopped working after aproximately 248 days 16 hours uptime.
> > So, my questions are:
> >  - has anyone heard of such a bug before?
> 
> Yes. Someone is doing signed maths on time stamps (2^31 1/100th of a second)
> 
> Ted ?
> 
> 
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