usb gadget stack: remove usb_ep_*_buffer(), part 1
Remove usb_ep_{alloc,free}_buffer() calls, for small dma-coherent buffers.
This patch just removes the interface and its users; later patches will
remove controller driver support.
- This interface is invariably not implemented correctly in the
controller drivers (e.g. using dma pools, a mechanism which
post-dates the interface by several years).
- At this point no gadget driver really *needs* to use it. In
current kernels, any driver that needs such a mechanism could
allocate a dma pool themselves.
Removing this interface is thus a simplification and improvement.
Note that the gmidi.c driver had a bug in this area; fixed.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
5 files changed