Date: Wed, 2 Mar 2005 00:09:46 +0100
From: Karol Kozimor <sziwan@hell.org.pl>
To: linux-kernel@vger.kernel.org
Cc: rmk+serial@arm.linux.org.uk
Subject: kernel BUG at drivers/serial/8250.c:1256!
Message-ID: <20050301230946.GA30841@hell.org.pl>
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Hi,

I've finally got around to test latest kernels and managed to find a bug in 
the serial subsystem, which happens during suspend.

I use a 3Com PC Card Bluetooth adapter that needs serial_cs and hci_uart
modules. Whenever I try to suspend using 2.6.10 or a newer kernel, the
following bug appears. Note that 2.6.9 works perfectly.

#v+ handwritten, 2.6.11-rc5
kernel BUG at drivers/serial/8250.c:1256!
invalid operand: 0000 [#1]
PREEMPT
[...]
EIP is at serial_unlink_irq_chain+0x4b/0x60 [8250]
[...]
Call Trace:
uart_suspend_port [serial_core]
serial_suspend [serial_cs]
serial_event [serial_cs]
send_event_callback [pcmcia]
__bus_for_each_dev
bus_for_each_dev
send_event_callback [pcmcia]
send_event [pcmcia]
send_event_callback [pcmcia]
handle_event [pcmcia]
ds_event [pcmcia]
send_event [pcmcia_core]
socket_suspend [pcmcia_core]
#v-

Photos are available here (sorry for the quality):
http://hell.org.pl/~sziwan/bug_8250-1.jpg
http://hell.org.pl/~sziwan/bug_8250-2.jpg
http://hell.org.pl/~sziwan/bug_8250-3.jpg

I'll be happy to provide whatever information is needed.

Best regards,

-- 
Karol 'sziwan' Kozimor
sziwan@hell.org.pl
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