On Fri, Dec 23, 2005 at 11:20:59AM +0200, Meelis Roos wrote:
> >I notice you're using gcc 4.0.3. Have you tried other compiler
> >versions?
>
> Tried 3.3 (Debian 3.3.6). Discover still gets the errors, opening port
> with minicom didn't this time (maybe I did start minicom an power on the
> switch in different order). But when closing minicom, I got the messages
> again (after the AGP messages).
So not much change.
Ok, please apply this patch on top of the previous and re-send the
kernel messages. This will let us see what's going on with 'l' and
'end'.
Thanks.
--- a/drivers/serial/8250.c 2005-12-23 09:26:45.273235110 +0000
+++ b/drivers/serial/8250.c 2005-12-23 09:32:37.347434791 +0000
@@ -146,6 +146,9 @@
unsigned char iir_b;
unsigned char lsr_e;
unsigned char iir_e;
+ void *l;
+ void *eb;
+ void *ee;
} log[64];
unsigned char log_idx;
};
@@ -1348,8 +1351,11 @@
up->log[up->log_idx].type = 0;
up->log[up->log_idx].num = pass_counter;
up->log[up->log_idx].iir_b = iir;
+ up->log[up->log_idx].l = l;
+ up->log[up->log_idx].eb = end;
if (!(iir & UART_IIR_NO_INT)) {
+ up->log[up->log_idx].type = 1;
spin_lock(&up->port.lock);
serial8250_handle_port(up, regs);
spin_unlock(&up->port.lock);
@@ -1361,6 +1367,7 @@
end = l;
up->log[up->log_idx].iir_e = serial_in(up, UART_IIR);
+ up->log[up->log_idx].ee = end;
up->log_idx = (up->log_idx + 1) & 63;
l = l->next;
@@ -1402,16 +1409,19 @@
struct uart_8250_port *up = list_entry(l, struct uart_8250_port, list);
int i;
- printk("serial8250: port %p(%d)\n", up, up->port.line);
+ printk("serial8250: port %p(%d) head=%p end=%p\n", up, up->port.line, i->head, end);
for (i = 0; i < 64; i++)
- printk("%d: jif=%08lx type=%02x num=%02x iir=%02x lsr=%02x => iir=%02x lsr=%02x\n", i,
+ printk("%d: jif=%08lx type=%02x num=%02x iir=%02x lsr=%02x => iir=%02x lsr=%02x l=%p eb=%p ee=%p\n", i,
up->log[(up->log_idx + i) & 63].jiffies,
up->log[(up->log_idx + i) & 63].type,
up->log[(up->log_idx + i) & 63].num,
up->log[(up->log_idx + i) & 63].iir_b,
up->log[(up->log_idx + i) & 63].lsr_b,
up->log[(up->log_idx + i) & 63].iir_e,
- up->log[(up->log_idx + i) & 63].lsr_e);
+ up->log[(up->log_idx + i) & 63].lsr_e,
+ up->log[(up->log_idx + i) & 63].l,
+ up->log[(up->log_idx + i) & 63].eb,
+ up->log[(up->log_idx + i) & 63].ee);
l = l->next;
} while (l != i->head);
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of: 2.6 Serial core
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