linux-kernel - [PATCH] media: b2bc: remove needless check before usb_free

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Message-Id: <20200720041341.7506-1-vulab@iscas.ac.cn>
Date:   Mon, 20 Jul 2020 04:13:41 +0000
From:   Xu Wang <vulab@...as.ac.cn>
To:     mchehab@...nel.org, sean@...s.org, vulab@...as.ac.cn,
        oneukum@...e.com, yangyingliang@...wei.com, johan@...nel.org,
        colin.king@...onical.com, linux-media@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH] media: b2bc: 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>
---
 drivers/media/usb/b2c2/flexcop-usb.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/media/usb/b2c2/flexcop-usb.c b/drivers/media/usb/b2c2/flexcop-usb.c
index 198ddfb8d2b1..c2cf1927c814 100644
--- a/drivers/media/usb/b2c2/flexcop-usb.c
+++ b/drivers/media/usb/b2c2/flexcop-usb.c
@@ -419,10 +419,7 @@ static void flexcop_usb_transfer_exit(struct flexcop_usb *fc_usb)
 			usb_free_urb(fc_usb->iso_urb[i]);
 		}
 
-	if (fc_usb->iso_buffer != NULL)
-		usb_free_coherent(fc_usb->udev,
-			fc_usb->buffer_size, fc_usb->iso_buffer,
-			fc_usb->dma_addr);
+	usb_free_coherent(fc_usb->udev, fc_usb->buffer_size, fc_usb->iso_buffer, fc_usb->dma_addr);
 }
 
 static int flexcop_usb_transfer_init(struct flexcop_usb *fc_usb)
-- 
2.17.1