diff options
| author | David Brownell <david-b@pacbell.net> | 2007-07-01 23:21:00 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-07-13 03:34:42 +0400 |
| commit | c67ab134ba9f83f9de86e58adfeaa14a9efa6e00 (patch) | |
| tree | df9022b4a38e955abbf254d71e00ac1fecce6420 /drivers/usb/gadget/dummy_hcd.c | |
| parent | 9d8bab58b758cd5a96d368a8cc64111c9ab50407 (diff) | |
| download | linux-c67ab134ba9f83f9de86e58adfeaa14a9efa6e00.tar.xz | |
usb gadget stack: remove usb_ep_*_buffer(), part 2
This patch removes controller driver infrastructure which supported
the now-removed usb_ep_{alloc,free}_buffer() calls.
As can be seen, many of the implementations of this were broken to
various degrees. Many didn't properly return dma-coherent mappings;
those which did so were necessarily ugly because of bogosity in the
underlying dma_free_coherent() calls ... which on many platforms
can't be called from the same contexts (notably in_irq) from which
their dma_alloc_coherent() sibling can be called.
The main potential downside of removing this is that gadget drivers
wouldn't have specific knowledge that the controller drivers have:
endpoints that aren't dma-capable don't need any dma mappings at all.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/gadget/dummy_hcd.c')
| -rw-r--r-- | drivers/usb/gadget/dummy_hcd.c | 36 |
1 files changed, 0 insertions, 36 deletions
diff --git a/drivers/usb/gadget/dummy_hcd.c b/drivers/usb/gadget/dummy_hcd.c index 9040b50d6425..f2fbdc7fe376 100644 --- a/drivers/usb/gadget/dummy_hcd.c +++ b/drivers/usb/gadget/dummy_hcd.c @@ -497,38 +497,6 @@ dummy_free_request (struct usb_ep *_ep, struct usb_request *_req) kfree (req); } -static void * -dummy_alloc_buffer ( - struct usb_ep *_ep, - unsigned bytes, - dma_addr_t *dma, - gfp_t mem_flags -) { - char *retval; - struct dummy_ep *ep; - struct dummy *dum; - - ep = usb_ep_to_dummy_ep (_ep); - dum = ep_to_dummy (ep); - - if (!dum->driver) - return NULL; - retval = kmalloc (bytes, mem_flags); - *dma = (dma_addr_t) retval; - return retval; -} - -static void -dummy_free_buffer ( - struct usb_ep *_ep, - void *buf, - dma_addr_t dma, - unsigned bytes -) { - if (bytes) - kfree (buf); -} - static void fifo_complete (struct usb_ep *ep, struct usb_request *req) { @@ -659,10 +627,6 @@ static const struct usb_ep_ops dummy_ep_ops = { .alloc_request = dummy_alloc_request, .free_request = dummy_free_request, - .alloc_buffer = dummy_alloc_buffer, - .free_buffer = dummy_free_buffer, - /* map, unmap, ... eventually hook the "generic" dma calls */ - .queue = dummy_queue, .dequeue = dummy_dequeue, |