Oliver Neukum wrote:
usb_alloc_urb (int i, int mem_flags) -> usb_alloc_urb (struct usb_device *dev, int i, int mem_flags)This change doesn't get away from that though ... there are two
Explanation:
The HCDs allocate and deallocate data structures during every submission.
classes of allocation, it only helps the easy one go away:
- "hcpriv" ... I posted a patch ages ago that just stores this
in the urb, like skbuf->cb[] for network drivers.
- 1..N TDs ... dependant on the specific buffer passed later,
except (usually) for ISO (where i == n)
The allocation it could get rid of is "hcpriv", and there's a
simpler way to to get rid of that (urb->cb or whatever) that
doesn't change the usbcore API.
So this change doesn't seem like it'd help enough to be
worth the global change to all drivers...
- Dave
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