Messages in this thread | | | Date | Sat, 4 Oct 2003 15:56:47 +0200 (MEST) | From | Mikael Pettersson <> | Subject | Re: FDC motor left on |
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On Sat, 4 Oct 2003 00:58:02 +0100, Dave Jones wrote: >On Fri, Oct 03, 2003 at 01:25:30PM -0400, Richard B. Johnson wrote: > > In linux-2.4.22 and earlier, if there is no FDC driver installed, > > the FDC motor may continue to run after boot if the motor was > > started as part of the BIOS boot sequence. > > This patch turns OFF the motor once Linux gets control. > > > > > > --- linux-2.4.22/arch/i386/boot/setup.S.orig Fri Aug 2 20:39:42 2002 > > +++ linux-2.4.22/arch/i386/boot/setup.S Fri Oct 3 11:50:43 2003 > > @@ -59,6 +59,8 @@ > >Does this mean the 'kill_motor' function in bootsect.S isn't doing >what it should be? If so, maybe that needs fixing instead of turning >it off in two places ?
It's my understanding that bootsect.S:kill_motor is part of the kernel's old builtin boot-from-floppy code, and that it doesn't run when some other boot loader loaded the kernel. (And it shouldn't have to.)
The workaround if you have a buggy BIOS or external loader is to configure BLK_DEV_FD as a built-in. I do that anyway for other reasons (to avoid an unresolved module autoloading failure in some cases; it's in RH bugzilla somewhere).
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