linux-kernel - Re: [PATCH 1/2] MEMSTICK: fix hangs on unexpected device removal in mspro

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Message-ID: <1280940821.16380.10.camel@maxim-laptop>
Date:	Wed, 04 Aug 2010 19:53:41 +0300
From:	Maxim Levitsky <maximlevitsky@...il.com>
To:	Alex Dubov <oakad@...oo.com>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] MEMSTICK: fix hangs on unexpected device removal
 in mspro_blk

On Wed, 2010-08-04 at 00:50 -0700, Alex Dubov wrote: 
> --- On Tue, 3/8/10, Maxim Levitsky <maximlevitsky@...il.com> wrote:
> 
> > Now that del_gendisk syncs, we better
> > start rejecting requests right away.
> 
> 
> I don't quite see why this change is needed. My understanding is, user
> accessible interface should be marked as removed as early, as possible.

The problem here is that del_gendisk, syncs the device.
This is new change, made after you did your drivers.

I have this problem on jMicron too (which otherwise works fine).

PS:

I have a copy of your ms_block.c.
I would would be very happy if you share with me, what problems does it
still have (besides need of trivial port for changes in block system,
because I want to push it upstream too.

I have MS DUO 64M to test it against.

Best regards,
Maxim Levitsky

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