linux-kernel - [PATCH] usb: endpoint : remove needless check before usb_free

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Message-Id: <20200727025208.8739-1-vulab@iscas.ac.cn>
Date:   Mon, 27 Jul 2020 02:52:08 +0000
From:   Xu Wang <vulab@...as.ac.cn>
To:     perex@...ex.cz, tiwai@...e.com, alexander@...y.me,
        e.burema@...il.com, vulab@...as.ac.cn, henryl@...dia.com,
        alsa-devel@...a-project.org
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH] usb: endpoint : remove needless check before usb_free_coherent()

usb_free_coherent() is safe with NULL addr and this check is
not required.

Signed-off-by: Xu Wang <vulab@...as.ac.cn>
---
 sound/usb/endpoint.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c
index 88760268fb55..3a2b2a309a71 100644
--- a/sound/usb/endpoint.c
+++ b/sound/usb/endpoint.c
@@ -615,9 +615,8 @@ static void release_urbs(struct snd_usb_endpoint *ep, int force)
 	for (i = 0; i < ep->nurbs; i++)
 		release_urb_ctx(&ep->urb[i]);
 
-	if (ep->syncbuf)
-		usb_free_coherent(ep->chip->dev, SYNC_URBS * 4,
-				  ep->syncbuf, ep->sync_dma);
+	usb_free_coherent(ep->chip->dev, SYNC_URBS * 4,
+			  ep->syncbuf, ep->sync_dma);
 
 	ep->syncbuf = NULL;
 	ep->nurbs = 0;
-- 
2.17.1