Re: [PATCH 01/12] usbnet: introduce usbnet 3 command helpers

On Fri, 12 Oct 2012, Ming Lei wrote:

quoted

probably easiest for the runtime PM core to use tsk_set_allowd_gfp()
before calling any runtime_resume method.

Yes, it might be done in usb runtime resume context because all
usb device might include a mass storage interface. But, in fact,
we can find if there is one mass storage interface on the current
configuration easily inside usb_runtime_resume().

Also, we can loose the constraint in runtime PM core, before calling
runtime_resume callback for one device, the current context is marked
as ~GFP_IOFS only if it is a block device or there is one block device
descendant. But the approach becomes a bit complicated because
device tree traversing is involved.

Exactly.  It's much easier just to do it always.

Alan Stern

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