From c67ab134ba9f83f9de86e58adfeaa14a9efa6e00 Mon Sep 17 00:00:00 2001 From: David Brownell Date: Sun, 1 Jul 2007 12:21:00 -0700 Subject: 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 Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/at91_udc.c | 21 --------------------- 1 file changed, 21 deletions(-) (limited to 'drivers/usb/gadget/at91_udc.c') diff --git a/drivers/usb/gadget/at91_udc.c b/drivers/usb/gadget/at91_udc.c index ba163f35bf2..63d7d656869 100644 --- a/drivers/usb/gadget/at91_udc.c +++ b/drivers/usb/gadget/at91_udc.c @@ -601,25 +601,6 @@ static void at91_ep_free_request(struct usb_ep *_ep, struct usb_request *_req) kfree(req); } -static void *at91_ep_alloc_buffer( - struct usb_ep *_ep, - unsigned bytes, - dma_addr_t *dma, - gfp_t gfp_flags) -{ - *dma = ~0; - return kmalloc(bytes, gfp_flags); -} - -static void at91_ep_free_buffer( - struct usb_ep *ep, - void *buf, - dma_addr_t dma, - unsigned bytes) -{ - kfree(buf); -} - static int at91_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) { @@ -788,8 +769,6 @@ static const struct usb_ep_ops at91_ep_ops = { .disable = at91_ep_disable, .alloc_request = at91_ep_alloc_request, .free_request = at91_ep_free_request, - .alloc_buffer = at91_ep_alloc_buffer, - .free_buffer = at91_ep_free_buffer, .queue = at91_ep_queue, .dequeue = at91_ep_dequeue, .set_halt = at91_ep_set_halt, -- cgit v1.2.3-70-g09d2