linux-kernel - [PATCH RESEND 2/3] media: flexcop-usb: clean up URB initialisation

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Message-Id: <20220822151456.27178-3-johan@kernel.org>
Date:   Mon, 22 Aug 2022 17:14:55 +0200
From:   Johan Hovold <johan@...nel.org>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>
Cc:     Hans Verkuil <hverkuil-cisco@...all.nl>,
        Sean Young <sean@...s.org>, linux-media@...r.kernel.org,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Johan Hovold <johan@...nel.org>
Subject: [PATCH RESEND 2/3] media: flexcop-usb: clean up URB initialisation

Clean up URB initialisation somewhat by introducing a temporary variable
and separating declaration and non-trivial initialisation.

Signed-off-by: Johan Hovold <johan@...nel.org>
---
 drivers/media/usb/b2c2/flexcop-usb.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/media/usb/b2c2/flexcop-usb.c b/drivers/media/usb/b2c2/flexcop-usb.c
index 31dd37d8236c..7102b346db05 100644
--- a/drivers/media/usb/b2c2/flexcop-usb.c
+++ b/drivers/media/usb/b2c2/flexcop-usb.c
@@ -425,12 +425,14 @@ static void flexcop_usb_transfer_exit(struct flexcop_usb *fc_usb)
 
 static int flexcop_usb_transfer_init(struct flexcop_usb *fc_usb)
 {
-	u16 frame_size = le16_to_cpu(
-		fc_usb->uintf->cur_altsetting->endpoint[0].desc.wMaxPacketSize);
-	int bufsize = B2C2_USB_NUM_ISO_URB * B2C2_USB_FRAMES_PER_ISO *
-		frame_size, i, j, ret;
+	struct usb_host_interface *alt = fc_usb->uintf->cur_altsetting;
+	u16 frame_size;
+	int bufsize, i, j, ret;
 	int buffer_offset = 0;
 
+	frame_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
+	bufsize = B2C2_USB_NUM_ISO_URB * B2C2_USB_FRAMES_PER_ISO * frame_size;
+
 	deb_ts("creating %d iso-urbs with %d frames each of %d bytes size = %d.\n",
 	       B2C2_USB_NUM_ISO_URB,
 			B2C2_USB_FRAMES_PER_ISO, frame_size, bufsize);
-- 
2.35.1