From: David Woodhouse <dwmw2@infradead.org>
To: "Joakim Tjernlund" <Joakim.Tjernlund@lumentis.se>
Cc: linux-mtd@lists.infradead.org
Subject: Re: write suspend and/or erase suspend
Date: Fri, 02 Aug 2002 10:42:43 +0100 [thread overview]
Message-ID: <1236.1028281363@redhat.com> (raw)
In-Reply-To: <003b01c23a06$c83c3940$0200a8c0@telia.com>
Joakim.Tjernlund@lumentis.se said:
> Yes, it's silly but can it happen by mistake? The flash state machine
> may be confused if an access is made during suspend.
You'll get a buffer full of status bits, I expect. Doesn't matter -- the
contents of the block at that time are undefined because they're in the
middle of an erase.
> hmm, my modified driver also supports "suspend erase to do a write".
> Could that be a problem?
Again, only if someone's trying to write to a block they're currently
trying to erase -- which they shouldn't be doing.
We _should_ be checking for these things in the driver, and we _definitely_
have to do so before start suspending writes to perform reads. But at the
moment, the only way a user could trigger wrong behaviour is if they're
doing something bloody stupid anyway.
--
dwmw2
prev parent reply other threads:[~2002-08-02 9:42 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-31 23:02 jffs2_scan_eraseblock() - errors Curtis, Allen
2002-08-01 10:44 ` David Woodhouse
2002-08-01 20:33 ` write suspend and/or erase suspend Joakim Tjernlund
2002-08-01 23:31 ` David Woodhouse
2002-08-02 9:27 ` Joakim Tjernlund
2002-08-02 9:42 ` David Woodhouse [this message]
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