From: Jakob Koschel <jakobkoschel@gmail.com>
To: Greg Kroah-Hartman <greg@kroah.com>
Cc: Jakob Koschel <jakobkoschel@gmail.com>,
linux-kernel@vger.kernel.org,
Linus Torvalds <torvalds@linux-foundation.org>,
Felipe Balbi <balbi@kernel.org>, Joel Stanley <joel@jms.id.au>,
Andrew Jeffery <andrew@aj.id.au>,
Nicolas Ferre <nicolas.ferre@microchip.com>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
Claudiu Beznea <claudiu.beznea@microchip.com>,
Cristian Birsan <cristian.birsan@microchip.com>,
Al Cooper <alcooperx@gmail.com>, Li Yang <leoyang.li@nxp.com>,
Vladimir Zapolskiy <vz@mleia.com>,
Daniel Mack <daniel@zonque.org>,
Haojian Zhuang <haojian.zhuang@gmail.com>,
Robert Jarzmik <robert.jarzmik@free.fr>,
Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>,
Alim Akhtar <alim.akhtar@samsung.com>,
Thierry Reding <thierry.reding@gmail.com>,
Jonathan Hunter <jonathanh@nvidia.com>,
Michal Simek <michal.simek@xilinx.com>,
linux-usb@vger.kernel.org (open list:USB GADGET/PERIPHERAL
SUBSYSTEM), Mike Rapoport <rppt@kernel.org>,
"Brian Johannesmeyer" <bjohannesmeyer@gmail.com>,
Cristiano Giuffrida <c.giuffrida@vu.nl>,
"Bos, H.J." <h.j.bos@vu.nl>
Subject: [PATCH 25/26] usb: gadget: dummy_hcd: replace usage of rc to check if a list element was found
Date: Sun, 6 Mar 2022 18:50:33 +0100 [thread overview]
Message-ID: <20220306175034.3084609-26-jakobkoschel@gmail.com> (raw)
In-Reply-To: <20220306175034.3084609-1-jakobkoschel@gmail.com>
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/dummy_hcd.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/drivers/usb/gadget/udc/dummy_hcd.c b/drivers/usb/gadget/udc/dummy_hcd.c
index a2d956af42a2..f21944707707 100644
--- a/drivers/usb/gadget/udc/dummy_hcd.c
+++ b/drivers/usb/gadget/udc/dummy_hcd.c
@@ -751,7 +751,7 @@ static int dummy_dequeue(struct usb_ep *_ep, struct usb_request *_req)
struct dummy *dum;
int retval = -EINVAL;
unsigned long flags;
- struct dummy_request *req = NULL;
+ struct dummy_request *req = NULL, *tmp;
if (!_ep || !_req)
return retval;
@@ -763,17 +763,18 @@ static int dummy_dequeue(struct usb_ep *_ep, struct usb_request *_req)
local_irq_save(flags);
spin_lock(&dum->lock);
- list_for_each_entry(req, &ep->queue, queue) {
- if (&req->req == _req) {
- list_del_init(&req->queue);
+ list_for_each_entry(tmp, &ep->queue, queue) {
+ if (&tmp->req == _req) {
+ list_del_init(&tmp->queue);
_req->status = -ECONNRESET;
+ req = tmp;
retval = 0;
break;
}
}
spin_unlock(&dum->lock);
- if (retval == 0) {
+ if (req) {
dev_dbg(udc_dev(dum),
"dequeued req %p from %s, len %d buf %p\n",
req, _ep->name, _req->length, _req->buf);
--
2.25.1
next prev parent reply other threads:[~2022-03-06 17:52 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-06 17:50 [PATCH 00/26] usb: gadget: remove usage of list iterator past the loop Jakob Koschel
2022-03-06 17:50 ` [PATCH 01/26] usb: gadget: fsl: remove usage of list iterator past the loop body Jakob Koschel
2022-03-06 18:39 ` Linus Torvalds
2022-03-06 19:19 ` Jakob Koschel
2022-03-06 17:50 ` [PATCH 02/26] usb: gadget: bdc: " Jakob Koschel
2022-03-06 17:50 ` [PATCH 03/26] usb: gadget: udc: atmel: " Jakob Koschel
2022-03-06 17:50 ` [PATCH 04/26] usb: gadget: udc: pxa25x: " Jakob Koschel
2022-03-06 17:50 ` [PATCH 05/26] usb: gadget: udc: at91: " Jakob Koschel
2022-03-06 17:50 ` [PATCH 06/26] usb: gadget: goku_udc: " Jakob Koschel
2022-03-06 17:50 ` [PATCH 07/26] usb: gadget: udc: gr_udc: " Jakob Koschel
2022-03-06 17:50 ` [PATCH 08/26] usb: gadget: lpc32xx_udc: " Jakob Koschel
2022-03-06 17:50 ` [PATCH 09/26] usb: gadget: mv_u3d: " Jakob Koschel
2022-03-06 17:50 ` [PATCH 10/26] usb: gadget: udc: mv_udc_core: " Jakob Koschel
2022-03-06 17:50 ` [PATCH 11/26] usb: gadget: net2272: " Jakob Koschel
2022-03-06 17:50 ` [PATCH 12/26] usb: gadget: udc: net2280: " Jakob Koschel
2022-03-06 17:50 ` [PATCH 13/26] usb: gadget: omap_udc: " Jakob Koschel
2022-03-06 17:50 ` [PATCH 14/26] usb: gadget: s3c-hsudc: " Jakob Koschel
2022-03-06 17:50 ` [PATCH 15/26] usb: gadget: udc-xilinx: " Jakob Koschel
2022-03-06 17:50 ` [PATCH 16/26] usb: gadget: aspeed: " Jakob Koschel
2022-03-06 17:50 ` [PATCH 17/26] usb: gadget: configfs: remove using list iterator after loop body as a ptr Jakob Koschel
2022-03-06 17:50 ` [PATCH 18/26] usb: gadget: legacy: " Jakob Koschel
2022-03-06 17:50 ` [PATCH 19/26] usb: gadget: udc: max3420_udc: " Jakob Koschel
2022-03-06 17:50 ` [PATCH 20/26] usb: gadget: tegra-xudc: " Jakob Koschel
2022-03-06 17:50 ` [PATCH 21/26] usb: gadget: composite: remove check of list iterator against head past the loop body Jakob Koschel
2022-03-06 17:50 ` [PATCH 22/26] usb: gadget: pxa27x_udc: replace usage of rc to check if a list element was found Jakob Koschel
2022-03-06 17:50 ` [PATCH 23/26] usb: gadget: udc: s3c2410: " Jakob Koschel
2022-03-06 17:50 ` [PATCH 24/26] usb: gadget: udc: core: " Jakob Koschel
2022-03-06 17:50 ` Jakob Koschel [this message]
2022-03-06 18:00 ` [PATCH 25/26] usb: gadget: dummy_hcd: " Greg KH
2022-03-06 19:16 ` Jakob Koschel
2022-03-06 17:50 ` [PATCH 26/26] usb: gadget: udc: s3c2410: " Jakob Koschel
2022-03-07 12:13 ` Krzysztof Kozlowski
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