From 57d4810ea0d9ca58a7bcc1336607f0cede0a2abf Mon Sep 17 00:00:00 2001 From: Andrew Morton Date: Tue, 31 Jul 2007 00:38:02 -0700 Subject: revert "x86, serial: convert legacy COM ports to platform devices" MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Revert 7e92b4fc345f5b6f57585fbe5ffdb0f24d7c9b26. It broke Sébastien Dugué's machine and Jeff said (persuasively) This seems like it will break decades-long-working stuff, in favor of breaking new ground in our favorite area, "trusting the BIOS." It's just not worth it for serial ports, IMO. Serial ports are something that just shouldn't break at this late stage in the game. My new Intel platform boxes don't even have serial ports, so I question the value of messing with serial port probing even more... because... just wait a year, and your box won't have a serial port either! :) I certainly don't object to the use of platform devices (or isa_driver), but the probe change seems questionable. That's sorta analagous to rewriting the floppy driver probe routine. Sure you could do it... but why risk all that damage and go through debugging all over again? It seems clear from this report that we cannot, should not, trust BIOS for something (a) so simple and (b) that has been working for over a decade. Much discussion ensued and we've decided to have another go at all of this. Cc: Sébastien Dugué Cc: Bjorn Helgaas Cc: Len Brown Cc: Adam Belay Cc: Matthew Garrett Cc: Russell King Cc: Jeff Garzik Acked-by: Alan Cox Cc: Michal Piotrowski Cc: Sascha Sommer Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Documentation/kernel-parameters.txt | 5 ----- 1 file changed, 5 deletions(-) (limited to 'Documentation/kernel-parameters.txt') diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index d763ebe11af..efdb42fd3fb 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -864,11 +864,6 @@ and is between 256 and 4096 characters. It is defined in the file lasi= [HW,SCSI] PARISC LASI driver for the 53c700 chip Format: addr:,irq: - legacy_serial.force [HW,X86-32,X86-64] - Probe for COM ports at legacy addresses even - if PNPBIOS or ACPI should describe them. This - is for working around firmware defects. - load_ramdisk= [RAM] List of ramdisks to load from floppy See Documentation/ramdisk.txt. -- cgit v1.2.3-18-g5258