Re: [PATCH] ide: fix revision comparison in ide_in_drive_list

[Kirill Smelkov]

21 Jun 2006 03:12, Alan Cox wrote:
> Ar Maw, 2006-06-20 am 15:19 -0700, ysgrifennodd Andrew Morton:
> > hm.  This seems...  rather serious.  I assume that in most cases, the
> > firmware rev which we have in the table (eg "24.09P07") is a full-string
> > match for the string which the drive returned.
> 
> They are full matches as far as I can see so it should be ok, plus the
> DMA blacklist is mostly hardware that went out ten or more years ago.
> Even if it did mis-trigger we'd be blacklisting extra firmware revs of
> iffy hardware so that isn't do worrying.

No, they are *not* full matches.

My case:
CF model="TRANSCEND", revision="20050811" as reported by "hdparm -I" and bios,

but

id->model="TRANSCEND",
id->fw_rev="20050811TRANSCEND"

note the trailing in id->fw_rev,

So lets look at ide_in_drive_list -- it should try to detect blacklisted revision,
so it looks for substr device_table->id_firmware in id->fw_rev.

NB: I don't know what causes id->fw_rev to be bogus (?), but maybe the right fix
NB: is to correct its initialization. Some person with IDE background should clarify this. 

-- 
	Kirill

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