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Subject[PATCH 22/26] usb: gadget: pxa27x_udc: replace usage of rc to check if a list element was found
Date
To move the list iterator variable into the list_for_each_entry_*()
macro in the future it should be avoided to use the list iterator
variable after the loop body.

To *never* use the list iterator variable after the loop it was
concluded to use a separate iterator variable [1].

This removes the need to check the rc value to determine if the
break/goto was hit and can be made more obvious
by checking if the variable was set within the list traversal loop.

Link: https://lore.kernel.org/all/YhdfEIwI4EdtHdym@kroah.com/
Signed-off-by: Jakob Koschel <jakobkoschel@gmail.com>
---
drivers/usb/gadget/udc/pxa27x_udc.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/gadget/udc/pxa27x_udc.c b/drivers/usb/gadget/udc/pxa27x_udc.c
index f4b7a2a3e711..eed793deeda0 100644
--- a/drivers/usb/gadget/udc/pxa27x_udc.c
+++ b/drivers/usb/gadget/udc/pxa27x_udc.c
@@ -1159,7 +1159,7 @@ static int pxa_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
{
struct pxa_ep *ep;
struct udc_usb_ep *udc_usb_ep;
- struct pxa27x_request *req;
+ struct pxa27x_request *req = NULL, *tmp;
unsigned long flags;
int rc = -EINVAL;

@@ -1173,15 +1173,16 @@ static int pxa_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
spin_lock_irqsave(&ep->lock, flags);

/* make sure it's actually queued on this endpoint */
- list_for_each_entry(req, &ep->queue, queue) {
- if (&req->req == _req) {
+ list_for_each_entry(tmp, &ep->queue, queue) {
+ if (&tmp->req == _req) {
+ req = tmp;
rc = 0;
break;
}
}

spin_unlock_irqrestore(&ep->lock, flags);
- if (!rc)
+ if (req)
req_done(ep, req, -ECONNRESET, NULL);
return rc;
}
--
2.25.1
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