media: cx231xx: Add EP5_BUF_SIZE and EP5_TIMEOUT_MS macros

Define EP5_BUF_SIZE and EP5_TIMEOUT_MS macros to make the code
more readable.
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Suggested-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

drivers/media/usb/cx231xx/cx231xx-core.c

@@ -751,12 +751,12 @@ int cx231xx_ep5_bulkout(struct cx231xx *dev, u8 *firmware, u16 size)
 	int ret = -ENOMEM;
 	u32 *buffer;
 
-	buffer = kmemdup(firmware, 4096, GFP_KERNEL);
+	buffer = kmemdup(firmware, EP5_BUF_SIZE, GFP_KERNEL);
 	if (buffer == NULL)
 		return -ENOMEM;
 
 	ret = usb_bulk_msg(dev->udev, usb_sndbulkpipe(dev->udev, 5),
-			buffer, 4096, &actlen, 2000);
+			buffer, EP5_BUF_SIZE, &actlen, EP5_TIMEOUT_MS);
 
 	if (ret)
 		dev_err(dev->dev,

drivers/media/usb/cx231xx/cx231xx.h

@@ -120,6 +120,9 @@
 #define CX23417_OSC_EN   8
 #define CX23417_RESET    9
 
+#define EP5_BUF_SIZE     4096
+#define EP5_TIMEOUT_MS   2000
+
 struct cx23417_fmt {
 	u32   fourcc;          /* v4l2 format id */
 	int   depth;