From: Chunfeng Yun <chunfeng.yun@mediatek.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Felipe Balbi <balbi@kernel.org>
Cc: Matthias Brugger <matthias.bgg@gmail.com>,
Chunfeng Yun <chunfeng.yun@mediatek.com>,
<linux-usb@vger.kernel.org>, <devicetree@vger.kernel.org>,
<linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-mediatek@lists.infradead.org>
Subject: [v3 PATCH] usb: mtu3: remove unnecessary NULL pointer checks
Date: Thu, 9 Jul 2020 15:09:01 +0800 [thread overview]
Message-ID: <1594278541-24968-1-git-send-email-chunfeng.yun@mediatek.com> (raw)
The class driver will ensure the parameters are not NULL
pointers before call the hook function of usb_ep_ops,
so no need check them again.
Reported-by: Markus Elfring <Markus.Elfring@web.de>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
---
v3: remove unnecessary NULL pointer checks but not add more checks.
v2: nothing changed, but abandon another patch.
---
drivers/usb/mtu3/mtu3_gadget.c | 25 ++++++-------------------
1 file changed, 6 insertions(+), 19 deletions(-)
diff --git a/drivers/usb/mtu3/mtu3_gadget.c b/drivers/usb/mtu3/mtu3_gadget.c
index f93732e..6b26cb8 100644
--- a/drivers/usb/mtu3/mtu3_gadget.c
+++ b/drivers/usb/mtu3/mtu3_gadget.c
@@ -263,23 +263,15 @@ void mtu3_free_request(struct usb_ep *ep, struct usb_request *req)
static int mtu3_gadget_queue(struct usb_ep *ep,
struct usb_request *req, gfp_t gfp_flags)
{
- struct mtu3_ep *mep;
- struct mtu3_request *mreq;
- struct mtu3 *mtu;
+ struct mtu3_ep *mep = to_mtu3_ep(ep);
+ struct mtu3_request *mreq = to_mtu3_request(req);
+ struct mtu3 *mtu = mep->mtu;
unsigned long flags;
int ret = 0;
- if (!ep || !req)
- return -EINVAL;
-
if (!req->buf)
return -ENODATA;
- mep = to_mtu3_ep(ep);
- mtu = mep->mtu;
- mreq = to_mtu3_request(req);
- mreq->mtu = mtu;
-
if (mreq->mep != mep)
return -EINVAL;
@@ -303,6 +295,7 @@ static int mtu3_gadget_queue(struct usb_ep *ep,
return -ESHUTDOWN;
}
+ mreq->mtu = mtu;
mreq->request.actual = 0;
mreq->request.status = -EINPROGRESS;
@@ -335,11 +328,11 @@ static int mtu3_gadget_dequeue(struct usb_ep *ep, struct usb_request *req)
struct mtu3_ep *mep = to_mtu3_ep(ep);
struct mtu3_request *mreq = to_mtu3_request(req);
struct mtu3_request *r;
+ struct mtu3 *mtu = mep->mtu;
unsigned long flags;
int ret = 0;
- struct mtu3 *mtu = mep->mtu;
- if (!ep || !req || mreq->mep != mep)
+ if (mreq->mep != mep)
return -EINVAL;
dev_dbg(mtu->dev, "%s : req=%p\n", __func__, req);
@@ -379,9 +372,6 @@ static int mtu3_gadget_ep_set_halt(struct usb_ep *ep, int value)
unsigned long flags;
int ret = 0;
- if (!ep)
- return -EINVAL;
-
dev_dbg(mtu->dev, "%s : %s...", __func__, ep->name);
spin_lock_irqsave(&mtu->lock, flags);
@@ -424,9 +414,6 @@ static int mtu3_gadget_ep_set_wedge(struct usb_ep *ep)
{
struct mtu3_ep *mep = to_mtu3_ep(ep);
- if (!ep)
- return -EINVAL;
-
mep->wedged = 1;
return usb_ep_set_halt(ep);
--
1.9.1
reply other threads:[~2020-07-09 7:09 UTC|newest]
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