linux-kernel - [PATCH] input: misc: remove needless check before usb_free

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Message-Id: <20200630063616.8060-1-vulab@iscas.ac.cn>
Date:   Tue, 30 Jun 2020 06:36:16 +0000
From:   Chen Ni <vulab@...as.ac.cn>
To:     dmitry.torokhov@...il.com, linux-input@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Xu Wang <vulab@...as.ac.cn>
Subject: [PATCH] input: misc: remove needless check before usb_free_coherent()

From: Xu Wang <vulab@...as.ac.cn>

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

Signed-off-by: Xu Wang <vulab@...as.ac.cn>
---
 drivers/input/misc/cm109.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/input/misc/cm109.c b/drivers/input/misc/cm109.c
index c09b9628ad34..e413801f0491 100644
--- a/drivers/input/misc/cm109.c
+++ b/drivers/input/misc/cm109.c
@@ -663,12 +663,8 @@ static const struct usb_device_id cm109_usb_table[] = {
 static void cm109_usb_cleanup(struct cm109_dev *dev)
 {
 	kfree(dev->ctl_req);
-	if (dev->ctl_data)
-		usb_free_coherent(dev->udev, USB_PKT_LEN,
-				  dev->ctl_data, dev->ctl_dma);
-	if (dev->irq_data)
-		usb_free_coherent(dev->udev, USB_PKT_LEN,
-				  dev->irq_data, dev->irq_dma);
+	usb_free_coherent(dev->udev, USB_PKT_LEN, dev->ctl_data, dev->ctl_dma);
+	usb_free_coherent(dev->udev, USB_PKT_LEN, dev->irq_data, dev->irq_dma);
 
 	usb_free_urb(dev->urb_irq);	/* parameter validation in core/urb */
 	usb_free_urb(dev->urb_ctl);	/* parameter validation in core/urb */
-- 
2.17.1