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authorDavid Brownell <david-b@pacbell.net>2007-07-01 12:21:00 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2007-07-12 16:34:42 -0700
commitc67ab134ba9f83f9de86e58adfeaa14a9efa6e00 (patch)
treedf9022b4a38e955abbf254d71e00ac1fecce6420 /drivers/usb/gadget/dummy_hcd.c
parent9d8bab58b758cd5a96d368a8cc64111c9ab50407 (diff)
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.c36
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,