No more floppy drive

M. Warner Losh imp at
Wed Aug 25 17:36:33 PDT 2004

In message: <412D2087.4000306 at>
            Nate Lawson <nate at> writes:
: M. Warner Losh wrote:
: > In message: <412D12D4.1000401 at>
: >             Nate Lawson <nate at> writes:
: > : There are only two ways currently to find fd0 on ISA systems: ACPI _FDE 
: > : probing and hints.  The acpi probe automatically falls back to the hints 
: > : system if _FDE fails so you should leave the hint.fd.0 lines in but 
: > : comment out hint.fdc lines (as you've done).
: > 
: > I think this is a bad idea, but may be what we have to do for 5.3.  We
: > can find out what drives are on the system by asking the rtc() if
: > there's no _FDE, which is what the old, pre-acpi code did (which is
: > why people are seeing their drives disappear now).
: This is incorrect.  The acpi commits did not remove any rtc probe; there 
: never was one.  There were only two commits by me to fdc.c so check them 
: out to see what I mean.  All I did was move the existing hints probe 
: into its own function, fdc_hints_probe().  The easiest way to see how 
: fdX gets probed is to look for callers to fdc_add_child().  They are 
: fdc_acpi_probe_children() and fdc_hints_probe().  The latter is called 
: by the ISA attachment or the ACPI attachment if the _FDE method is not 
: present.  (BTW, it seems the pccard attachment doesn't probe this way?)

The pccard attachment knows there must be a fd.


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