On Sun, Feb 26, 2006 at 11:34:48PM +0100, Karol Kozimor wrote:
> Thus wrote Russell King:
> > > > Calling serial functions to flush buffers, or try to send more data
> > > > after the port has been closed or hung up is a bug in the code doing
> > > > the calling, not in the serial_core driver.
> > > >
> > > > Make this explicitly obvious by adding BUG_ON()'s.
> > >
> > > If we make it
> > >
> > > if (!info) {
> > > WARN_ON(1);
> > > return;
> > > }
> > >
> > > will that allow people's kernels to limp along until it gets fixed?
> > "until" - I think you mean "if anyone ever bothers" so no I don't agree.
>
> Russel, I agree this should be clearly marked and an oops seems okay here,
> but we're talking dead systems here (dead as in all interrupts masked type
> of dead). Most users won't even be aware an oops occured, let alone be able
> to read the messages on the console.
>
> I was just lucky because after the first one I got (#5958, a regular oops)
> I tried to nail it down in text mode, with the console loglevel upped a
> bit, so I was able to see what the panic (#6131) was all about.
>
> I think we really need those *_ON()s at least in uart_write().
I don't think it'll make a blind bit of difference. The oopses have
been known about (to me and others) since about October 2005... Pavel
Machek was the first to report the hci_uart problems.
I diagnosed the uart_flush_buffer() oops being caused by hci_uart back
in October and where did that get us - nowhere at the time, but later
another bug report in bugzilla against serial and no progress.
Excuse me if I'm despondent on this issue - I'm personally looking for
a way out of being assigned blame for the crap known as hci_uart.
--
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/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
