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From: "Johan Adolfsson" <johan.adolfsson@axis.com>
To: "David Woodhouse" <dwmw2@infradead.org>,
        "David S. Miller" <davem@redhat.com>
Cc: "Chris Wedgwood" <cw@f00f.org>, "Jeff Garzik" <jgarzik@mandrakesoft.com>,
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Subject: Re: Missing cache flush. 
Date: Tue, 5 Jun 2001 11:43:39 +0200
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Possibly saying something extremly stupid here,
how about simply "fakewriting" 0xFF to the flash
after an erase to update any caches?

> 2. Flash. A few writes of magic data to magic addresses and a whole erase
>    block suddenly contains 0xFF. The CPU doesn't notice that either.

 do_erase_stuff();
 /* While verifying, update cache */
                for (address = adr; address < (adr + size); address++) {
                        if ((verify = map->read8(map, address)) != 0xFF) {
                                error = 1;
                                break;
                        }
                        /* "Fake" write 0xFF's to the erased sector so that
caches are updated
                         *  after we verified that uncached data is ok
                         */
                        *(unsigned char*)CACHED(address) = 0xFF;
                }

/Johan