linux-kernel - [PATCH 2/7] staging: r8188eu: simplify rtw_alloc

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Date:   Tue,  7 Feb 2023 20:23:14 +0100
From:   Martin Kaiser <martin@...ser.cx>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Larry Finger <Larry.Finger@...inger.net>,
        Phillip Potter <phil@...lpotter.co.uk>,
        Michael Straube <straube.linux@...il.com>,
        Pavel Skripkin <paskripkin@...il.com>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Martin Kaiser <martin@...ser.cx>
Subject: [PATCH 2/7] staging: r8188eu: simplify rtw_alloc_xmitframe

Make the rtw_alloc_xmitframe function a bit simpler.

The container_of() call never returns NULL. The if (pxframe) check is
false only if pfree_xmit_queue is empty. Handle this special case
explicitly and save one level of indentation.

Signed-off-by: Martin Kaiser <martin@...ser.cx>
---
 drivers/staging/r8188eu/core/rtw_xmit.c | 40 +++++++++++--------------
 1 file changed, 17 insertions(+), 23 deletions(-)

diff --git a/drivers/staging/r8188eu/core/rtw_xmit.c b/drivers/staging/r8188eu/core/rtw_xmit.c
index 4d6210d89533..6ec342b726f9 100644
--- a/drivers/staging/r8188eu/core/rtw_xmit.c
+++ b/drivers/staging/r8188eu/core/rtw_xmit.c
@@ -1256,38 +1256,32 @@ struct xmit_frame *rtw_alloc_xmitframe(struct xmit_priv *pxmitpriv)/* _queue *pf
 
 	spin_lock_bh(&pfree_xmit_queue->lock);
 
-	if (list_empty(&pfree_xmit_queue->queue)) {
-		pxframe =  NULL;
-	} else {
-		phead = get_list_head(pfree_xmit_queue);
-
-		plist = phead->next;
+	if (list_empty(&pfree_xmit_queue->queue))
+		goto out;
 
-		pxframe = container_of(plist, struct xmit_frame, list);
-
-		list_del_init(&pxframe->list);
-	}
+	phead = get_list_head(pfree_xmit_queue);
+	plist = phead->next;
+	pxframe = container_of(plist, struct xmit_frame, list);
+	list_del_init(&pxframe->list);
 
-	if (pxframe) { /* default value setting */
-		pxmitpriv->free_xmitframe_cnt--;
+	pxmitpriv->free_xmitframe_cnt--;
 
-		pxframe->buf_addr = NULL;
-		pxframe->pxmitbuf = NULL;
+	pxframe->buf_addr = NULL;
+	pxframe->pxmitbuf = NULL;
 
-		memset(&pxframe->attrib, 0, sizeof(struct pkt_attrib));
-		/* pxframe->attrib.psta = NULL; */
+	memset(&pxframe->attrib, 0, sizeof(struct pkt_attrib));
+	/* pxframe->attrib.psta = NULL; */
 
-		pxframe->frame_tag = DATA_FRAMETAG;
+	pxframe->frame_tag = DATA_FRAMETAG;
 
-		pxframe->pkt = NULL;
-		pxframe->pkt_offset = 1;/* default use pkt_offset to fill tx desc */
+	pxframe->pkt = NULL;
+	pxframe->pkt_offset = 1;/* default use pkt_offset to fill tx desc */
 
-		pxframe->agg_num = 1;
-		pxframe->ack_report = 0;
-	}
+	pxframe->agg_num = 1;
+	pxframe->ack_report = 0;
 
+out:
 	spin_unlock_bh(&pfree_xmit_queue->lock);
-
 	return pxframe;
 }
 
-- 
2.30.2