linux-kernel - [PATCH] staging: emxx_udc: remove unnecessary nullpointer checks

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Message-Id: <20180924173425.12162-1-areklis909@gmail.com>
Date:   Mon, 24 Sep 2018 19:34:22 +0200
From:   Arkadiusz Lis <areklis909@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Arkadiusz Lis <areklis909@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Christopher Diaz Riveros <chrisadr@...too.org>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: [PATCH] staging: emxx_udc: remove unnecessary nullpointer checks

This patch removes nullpointer checks which are redundant. container_of
returns structure containing entity which we know for sure is not null,
so the whole structure can not be null.

Signed-off-by: Arkadiusz Lis <areklis909@...il.com>
---
 drivers/staging/emxx_udc/emxx_udc.c | 24 ++----------------------
 1 file changed, 2 insertions(+), 22 deletions(-)

diff --git a/drivers/staging/emxx_udc/emxx_udc.c b/drivers/staging/emxx_udc/emxx_udc.c
index 3e51476a7045..0e8d3f232fe9 100644
--- a/drivers/staging/emxx_udc/emxx_udc.c
+++ b/drivers/staging/emxx_udc/emxx_udc.c
@@ -2513,7 +2513,7 @@ static int nbu2ss_ep_enable(
 	}
 
 	ep = container_of(_ep, struct nbu2ss_ep, ep);
-	if ((!ep) || (!ep->udc)) {
+	if ((!ep->udc)) {
 		pr_err(" *** %s, ep == NULL !!\n", __func__);
 		return -EINVAL;
 	}
@@ -2570,7 +2570,7 @@ static int nbu2ss_ep_disable(struct usb_ep *_ep)
 	}
 
 	ep = container_of(_ep, struct nbu2ss_ep, ep);
-	if ((!ep) || (!ep->udc)) {
+	if (!ep->udc) {
 		pr_err("udc: *** %s, ep == NULL !!\n", __func__);
 		return -EINVAL;
 	}
@@ -2743,10 +2743,6 @@ static int nbu2ss_ep_dequeue(
 	}
 
 	ep = container_of(_ep, struct nbu2ss_ep, ep);
-	if (!ep) {
-		pr_err("%s, ep == NULL !!\n", __func__);
-		return -EINVAL;
-	}
 
 	udc = ep->udc;
 	if (!udc)
@@ -2787,10 +2783,6 @@ static int nbu2ss_ep_set_halt(struct usb_ep *_ep, int value)
 	}
 
 	ep = container_of(_ep, struct nbu2ss_ep, ep);
-	if (!ep) {
-		pr_err("%s, bad ep\n", __func__);
-		return -EINVAL;
-	}
 
 	udc = ep->udc;
 	if (!udc) {
@@ -2839,10 +2831,6 @@ static int nbu2ss_ep_fifo_status(struct usb_ep *_ep)
 	}
 
 	ep = container_of(_ep, struct nbu2ss_ep, ep);
-	if (!ep) {
-		pr_err("%s, bad ep\n", __func__);
-		return -EINVAL;
-	}
 
 	udc = ep->udc;
 	if (!udc) {
@@ -2885,10 +2873,6 @@ static void  nbu2ss_ep_fifo_flush(struct usb_ep *_ep)
 	}
 
 	ep = container_of(_ep, struct nbu2ss_ep, ep);
-	if (!ep) {
-		pr_err("udc: %s, bad ep\n", __func__);
-		return;
-	}
 
 	udc = ep->udc;
 	if (!udc) {
@@ -2959,10 +2943,6 @@ static int nbu2ss_gad_wakeup(struct usb_gadget *pgadget)
 	}
 
 	udc = container_of(pgadget, struct nbu2ss_udc, gadget);
-	if (!udc) {
-		dev_err(&pgadget->dev, "%s, udc == NULL\n", __func__);
-		return -EINVAL;
-	}
 
 	data = gpio_get_value(VBUS_VALUE);
 	if (data == 0) {
-- 
2.17.1