http://bugzilla.kernel.org/show_bug.cgi?id=5810
[EMAIL PROTECTED] changed:
What |Removed |Added
----------------------------------------------------------------------------
Owner|acpi_config- |[EMAIL PROTECTED]
|[EMAIL PROTECTED] |
|bugs.osdl.org |
Severity|low |normal
Component|Network |Serial
------- Additional Comments From [EMAIL PROTECTED] 2006-01-04 01:38 -------
I am sorry for the comment where I stated that disabling ACPI solves the
problem. This is NOT TRUE, and it probably has nothing to do with ACPI, because
the bug is back today. :( I tried booting with "acpi=noirq", then "pci=noacpi"
and then even with "acpi=off", and the spurious interrupt occured in all three
cases.
However, the bug seems to be in the serial driver, not in e100, because:
The bug occurs IFF (if and only if) the serial driver detects the winmodem as a
16450. That is, the spurious interrupts occur iff syslog contains this line:
localhost kernel: 0000:00:09.1: ttyS2 at I/O 0x1478 (irq = 11) is a 16450
This happens on some boots. On other boots, there is no such line (even though
the device seems to be detected because it is assigned an interrupt, as can be
seen in the log), and then resetting the Ethernet controller does not generate
any extra interrupts.
I guess the correct solution would be to ignore the winmodem in serial8250_pci
somehow.
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