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Subject[PATCH] ACPI serial fix
Date
Here's another little fix for ACPI serial discovery in 2.6.

Intel 870 firmware reports an extra zero-length IO port range, which
is bogus, as far as I can tell. Ignore it.

===== drivers/serial/8250_acpi.c 1.4 vs edited =====
--- 1.4/drivers/serial/8250_acpi.c Mon Oct 6 15:57:02 2003
+++ edited/drivers/serial/8250_acpi.c Wed Oct 8 12:36:31 2003
@@ -38,6 +38,11 @@
static acpi_status acpi_serial_port(struct serial_struct *req,
struct acpi_resource_io *io)
{
+ if (!io->range_length) {
+ printk(KERN_ERR "%s: zero-length IO port range?\n", __FUNCTION__);
+ return AE_ERROR;
+ }
+
req->port = io->min_base_address;
req->io_type = SERIAL_IO_PORT;
return AE_OK;
-
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