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Bjorn Helgaas | 16 Sep 2005 19:42
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[PATCH] serial: remove 8250_acpi (subsumed by 8250_pnp and PNPACPI)

With the combination of PNPACPI and 8250_pnp, we no longer need
8250_acpi.

The only in-tree configs that contain CONFIG_SERIAL_8250_ACPI are ia64.
ia64 users should make sure CONFIG_PNP and CONFIG_PNPACPI are set so
8250_pnp.c can discover built-in serial ports.  Tony has already
accepted a patch to turn them on in the default configs.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas <at> hp.com>

Index: work-vga2/drivers/serial/Kconfig
===================================================================
--- work-vga2.orig/drivers/serial/Kconfig	2005-09-14 09:29:08.000000000 -0600
+++ work-vga2/drivers/serial/Kconfig	2005-09-15 09:58:40.000000000 -0600
 <at>  <at>  -77,14 +77,6  <at>  <at> 

 	  If unsure, say N.

-config SERIAL_8250_ACPI
-	bool "8250/16550 device discovery via ACPI namespace"
-	default y if IA64
-	depends on ACPI && SERIAL_8250
-	---help---
-	  If you wish to enable serial port discovery via the ACPI
-	  namespace, say Y here.  If unsure, say N.
-
 config SERIAL_8250_NR_UARTS
 	int "Maximum number of 8250/16550 serial ports"
 	depends on SERIAL_8250
Index: work-vga2/drivers/serial/Makefile
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Bjorn Helgaas | 20 Sep 2005 18:04
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Re: [PATCH] serial: remove 8250_acpi (subsumed by 8250_pnp and PNPACPI)

On Friday 16 September 2005 11:42 am, Bjorn Helgaas wrote:
> With the combination of PNPACPI and 8250_pnp, we no longer need
> 8250_acpi.
> 
> The only in-tree configs that contain CONFIG_SERIAL_8250_ACPI are ia64.
> ia64 users should make sure CONFIG_PNP and CONFIG_PNPACPI are set so
> 8250_pnp.c can discover built-in serial ports.  Tony has already
> accepted a patch to turn them on in the default configs.

Please don't apply this just yet.  Tony Luck tried it and tripped
over a deficiency in PNPACPI that I'll have to fix first.

(HP rx1620 has an ACPI_RSTYPE_ADDRESS32 item in its _PRS, and
PNPACPI doesn't know what to do with it.)

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Geoffrey Barnard | 24 Sep 2005 12:35
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Dominik Wilczynski | 28 Sep 2005 13:27
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PROBLEM: linux serial rs-232 bug when open()

Hi,

I'm doing embedded development with rs-232 interface and I noticed a bug in
serial driver. When I open ttySx device, open() function returns 0 instead
of proper file descriptor. I have to perform open() twice before I get exact
file descriptor. 

Some guys were discussing similar bug:
http://www.uwsg.iu.edu/hypermail/linux/kernel/0104.2/0830.html

I use kernel 2.6.11.4-20a-default on SUSE 9.3 disctribution. If you would
like to have more details on this, please let me know and I 'll send you
description of my configuration.

Best Regards,

 
Dominik Wilczynski
-----------------------------------------
Software Design Engeneer

dominik.wilczynski <at> s3group.com

Silicon & Software Systems
www.s3group.com

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