* Does the block layer prevent races between open() and unregister()?
@ 2004-02-28 4:05 Alan Stern
2004-03-03 8:06 ` Yury V. Umanets
0 siblings, 1 reply; 3+ messages in thread
From: Alan Stern @ 2004-02-28 4:05 UTC (permalink / raw
To: Jens Axboe; +Cc: linux-kernel
A classic race that all drivers for hot-unpluggable devices have to deal
with is the race between open() and unregister() (or disconnect()).
Does the block layer have any mechanism to prevent such races? Or does it
rely on the lower-level drivers handling such things by themselves?
Alan Stern
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Does the block layer prevent races between open() and unregister()?
2004-02-28 4:05 Does the block layer prevent races between open() and unregister()? Alan Stern
@ 2004-03-03 8:06 ` Yury V. Umanets
2004-03-03 15:34 ` Alan Stern
0 siblings, 1 reply; 3+ messages in thread
From: Yury V. Umanets @ 2004-03-03 8:06 UTC (permalink / raw
To: Alan Stern; +Cc: Jens Axboe, linux-kernel
On Sat, 2004-02-28 at 06:05, Alan Stern wrote:
> A classic race that all drivers for hot-unpluggable devices have to deal
> with is the race between open() and unregister() (or disconnect()).
>
> Does the block layer have any mechanism to prevent such races? Or does it
> rely on the lower-level drivers handling such things by themselves?
According to usb-skel driver, nobody cares about.
>
> Alan Stern
>
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Does the block layer prevent races between open() and unregister()?
2004-03-03 8:06 ` Yury V. Umanets
@ 2004-03-03 15:34 ` Alan Stern
0 siblings, 0 replies; 3+ messages in thread
From: Alan Stern @ 2004-03-03 15:34 UTC (permalink / raw
To: Yury V. Umanets; +Cc: Jens Axboe, linux-kernel
On Wed, 3 Mar 2004, Yury V. Umanets wrote:
> On Sat, 2004-02-28 at 06:05, Alan Stern wrote:
> > A classic race that all drivers for hot-unpluggable devices have to deal
> > with is the race between open() and unregister() (or disconnect()).
> >
> > Does the block layer have any mechanism to prevent such races? Or does it
> > rely on the lower-level drivers handling such things by themselves?
> According to usb-skel driver, nobody cares about.
The usb-skeleton isn't relevant to this question because it doesn't use
the block layer.
Alan Stern
^ permalink raw reply [flat|nested] 3+ messages in thread
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2004-02-28 4:05 Does the block layer prevent races between open() and unregister()? Alan Stern
2004-03-03 8:06 ` Yury V. Umanets
2004-03-03 15:34 ` Alan Stern
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