From 013056a09afd324e729d64b9a0e66a004604e1d6 Mon Sep 17 00:00:00 2001 From: Sergei Shtylyov Date: Fri, 27 Mar 2009 12:58:31 -0700 Subject: [PATCH] musb_host: refactor URB giveback As musb_advance_schedule() is now the only remaning caller of musb_giveback() (and the only valid context of such call), just fold the latter into the former and then rename __musb_giveback() into musb_giveback(). This is a net minor shrink. Signed-off-by: Sergei Shtylyov Signed-off-by: David Brownell --- drivers/usb/musb/musb_host.c | 54 +++++++++++++++-------------------------- 1 files changed, 20 insertions(+), 34 deletions(-) diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c index bc89079..e833959 100644 --- a/drivers/usb/musb/musb_host.c +++ b/drivers/usb/musb/musb_host.c @@ -292,9 +292,8 @@ start: } } -/* caller owns controller lock, irqs are blocked */ -static void -__musb_giveback(struct musb *musb, struct urb *urb, int status) +/* Context: caller owns controller lock, IRQs are blocked */ +static void musb_giveback(struct musb *musb, struct urb *urb, int status) __releases(musb->lock) __acquires(musb->lock) { @@ -347,14 +346,22 @@ static inline void musb_save_toggle(struct musb_qh *qh, int is_in, usb_settoggle(urb->dev, qh->epnum, !is_in, csr ? 1 : 0); } -/* caller owns controller lock, irqs are blocked */ -static struct musb_qh * -musb_giveback(struct musb_qh *qh, struct urb *urb, int status) +/* + * Advance this hardware endpoint's queue, completing the specified URB and + * advancing to either the next URB queued to that qh, or else invalidating + * that qh and advancing to the next qh scheduled after the current one. + * + * Context: caller owns controller lock, IRQs are blocked + */ +static void musb_advance_schedule(struct musb *musb, struct urb *urb, + struct musb_hw_ep *hw_ep, int is_in) { + struct musb_qh *qh = musb_ep_get_qh(hw_ep, is_in); struct musb_hw_ep *ep = qh->hw_ep; - struct musb *musb = ep->musb; - int is_in = usb_pipein(urb->pipe); int ready = qh->is_ready; + int status; + + status = (urb->status == -EINPROGRESS) ? 0 : urb->status; /* save toggle eagerly, for paranoia */ switch (qh->type) { @@ -363,13 +370,13 @@ musb_giveback(struct musb_qh *qh, struct urb *urb, int status) musb_save_toggle(qh, is_in, urb); break; case USB_ENDPOINT_XFER_ISOC: - if (status == 0 && urb->error_count) + if (urb->error_count) status = -EXDEV; break; } qh->is_ready = 0; - __musb_giveback(musb, urb, status); + musb_giveback(musb, urb, status); qh->is_ready = ready; /* reclaim resources (and bandwidth) ASAP; deschedule it, and @@ -413,31 +420,10 @@ musb_giveback(struct musb_qh *qh, struct urb *urb, int status) break; } } - return qh; -} - -/* - * Advance this hardware endpoint's queue, completing the specified urb and - * advancing to either the next urb queued to that qh, or else invalidating - * that qh and advancing to the next qh scheduled after the current one. - * - * Context: caller owns controller lock, irqs are blocked - */ -static void -musb_advance_schedule(struct musb *musb, struct urb *urb, - struct musb_hw_ep *hw_ep, int is_in) -{ - struct musb_qh *qh = musb_ep_get_qh(hw_ep, is_in); - - if (urb->status == -EINPROGRESS) - qh = musb_giveback(qh, urb, 0); - else - qh = musb_giveback(qh, urb, urb->status); if (qh != NULL && qh->is_ready) { DBG(4, "... next ep%d %cX urb %p\n", - hw_ep->epnum, is_in ? 'R' : 'T', - next_urb(qh)); + hw_ep->epnum, is_in ? 'R' : 'T', next_urb(qh)); musb_start_urb(musb, is_in, qh); } } @@ -2080,7 +2066,7 @@ static int musb_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) ret = 0; qh->is_ready = 0; - __musb_giveback(musb, urb, 0); + musb_giveback(musb, urb, 0); qh->is_ready = ready; /* If nothing else (usually musb_giveback) is using it @@ -2164,7 +2150,7 @@ musb_h_disable(struct usb_hcd *hcd, struct usb_host_endpoint *hep) * will activate any of these as it advances. */ while (!list_empty(&hep->urb_list)) - __musb_giveback(musb, next_urb(qh), -ESHUTDOWN); + musb_giveback(musb, next_urb(qh), -ESHUTDOWN); hep->hcpriv = NULL; list_del(&qh->ring); -- 1.6.0.4