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staging: emxx_udc: use list_first_entry_or_null() 

Simplify the code with list_first_entry_or_null().

Signed-off-by: Geliang Tang <geliangtang@163.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Geliang Tang 2015-11-16 21:54:46 +08:00 committed by Greg Kroah-Hartman
parent e7cfb3907d
commit e59ac74794
1 changed files with 5 additions and 25 deletions
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30
drivers/staging/emxx_udc/emxx_udc.c
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@ -1285,11 +1285,7 @@ static void _nbu2ss_restert_transfer(struct nbu2ss_ep *ep)
bool bflag = FALSE;
struct nbu2ss_req *req;
if (list_empty(&ep->queue))
req = NULL;
else
req = list_entry(ep->queue.next, struct nbu2ss_req, queue);
req = list_first_entry_or_null(&ep->queue, struct nbu2ss_req, queue);
if (!req)
return;
@ -1784,11 +1780,7 @@ static inline int _nbu2ss_ep0_in_data_stage(struct nbu2ss_udc *udc)
struct nbu2ss_req *req;
struct nbu2ss_ep *ep = &udc->ep[0];
if (list_empty(&ep->queue))
req = NULL;
else
req = list_entry(ep->queue.next, struct nbu2ss_req, queue);
req = list_first_entry_or_null(&ep->queue, struct nbu2ss_req, queue);
if (!req)
req = &udc->ep0_req;
@ -1811,11 +1803,7 @@ static inline int _nbu2ss_ep0_out_data_stage(struct nbu2ss_udc *udc)
struct nbu2ss_req *req;
struct nbu2ss_ep *ep = &udc->ep[0];
if (list_empty(&ep->queue))
req = NULL;
else
req = list_entry(ep->queue.next, struct nbu2ss_req, queue);
req = list_first_entry_or_null(&ep->queue, struct nbu2ss_req, queue);
if (!req)
req = &udc->ep0_req;
@ -1838,11 +1826,7 @@ static inline int _nbu2ss_ep0_status_stage(struct nbu2ss_udc *udc)
struct nbu2ss_req *req;
struct nbu2ss_ep *ep = &udc->ep[0];
if (list_empty(&ep->queue))
req = NULL;
else
req = list_entry(ep->queue.next, struct nbu2ss_req, queue);
req = list_first_entry_or_null(&ep->queue, struct nbu2ss_req, queue);
if (!req) {
req = &udc->ep0_req;
if (req->req.complete)
@ -2145,11 +2129,7 @@ static inline void _nbu2ss_epn_int(struct nbu2ss_udc *udc, u32 epnum)
/* Interrupt Clear */
_nbu2ss_writel(&udc->p_regs->EP_REGS[num].EP_STATUS, ~(u32)status);
if (list_empty(&ep->queue))
req = NULL;
else
req = list_entry(ep->queue.next, struct nbu2ss_req, queue);
req = list_first_entry_or_null(&ep->queue, struct nbu2ss_req, queue);
if (!req) {
/* pr_warn("=== %s(%d) req == NULL\n", __func__, epnum); */
return;