Messages in this thread | | | Date | Wed, 6 Apr 2016 11:05:52 -0400 (EDT) | From | Alan Stern <> | Subject | Re: [PATCH] usb: f_mass_storage: test whether thread is running before starting another |
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On Wed, 6 Apr 2016, Michal Nazarewicz wrote:
> On Tue, Apr 05 2016, Alan Stern wrote: > > Suppose one usb_function is carrying out an I/O operation while > > another one in the same config gets a Set-Interface request from the > > host. > > That cannot happen. A single instance of mass_storage cannot¹ be added > twice to the same configuration. > > ¹ To be more precise, not via configfs. A legacy gadget could do that, > but that would be a bug in that legacy driver, not f_mass_storage. > Moreover, no current legacy gadgets do that though so IMO this is an > academic discussion.
Okay. Then I suggest adding this explanation to the patch description.
BTW, is configfs capable of adding a single instance twice in different configs? Or is that again something only legacy gadgets can do?
Alan Stern
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