Re: another unusual flag for a really limited device

On Tue, Nov 13, 2007 at 07:35:45PM -0600, Doug Maxey wrote:
> Have run across a virtual USB host that needs (yes, I know, a strong
> word :) to limit the maximum number of sectors transferred in a single
> request to 32.  In theory, the device should be fine with 32k, but
> when it loses, it never seems to recover without a full reset.
> 
> Did some searching in the archives, but saw nothing.
> 
> What about something along the lines of adding UL_FL_MAX_SECTORS_32 to
> follow the pattern used with MAX_SECTORS_64, thusly?
> 
> Based on linus 2.6.24-rc2.

I can't say I'm really happy about another flag, but I can't exactly object
too strongly.  This is probably the best fix we're going to find.

Tho, I'm seriously tempted to make the choice MAX_SECTORS_64 and
MAX_SECTORS_1 -- if a device can't handle 64 sectors at a time, then let's
just limit it to 1 and call it a day.   Otherwise we're going to wind up
with MAX_SECTORS_32, _16, _8, _4, and _2 someday.

Matt

-- 
Matthew Dharm                              Home: [email protected] 
Maintainer, Linux USB Mass Storage Driver

Way to go, lava boy.
					-- Stef to Greg
User Friendly, 3/26/1998

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