linux-kernel - [PATCH v2 19/36] media: usb: gspca: Fix misuse of min_buffers

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Message-Id: <20231204132323.22811-20-benjamin.gaignard@collabora.com>
Date:   Mon,  4 Dec 2023 14:23:06 +0100
From:   Benjamin Gaignard <benjamin.gaignard@...labora.com>
To:     hverkuil@...all.nl, mchehab@...nel.org, tfiga@...omium.org,
        m.szyprowski@...sung.com, matt.ranostay@...sulko.com
Cc:     linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        linux-staging@...ts.linux.dev, kernel@...labora.com,
        Benjamin Gaignard <benjamin.gaignard@...labora.com>
Subject: [PATCH v2 19/36] media: usb: gspca: Fix misuse of min_buffers_needed field

'min_buffers_needed' is suppose to be used to indicate the number
of buffers needed by DMA engine to start streaming.
gspca driver doesn't use DMA engine and just want to specify
the minimum number of buffers to allocate when calling VIDIOC_REQBUFS.
That 'min_reqbufs_allocation' field purpose so use it.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...labora.com>
---
 drivers/media/usb/gspca/gspca.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/media/usb/gspca/gspca.c b/drivers/media/usb/gspca/gspca.c
index 770714c34295..7b701275f76d 100644
--- a/drivers/media/usb/gspca/gspca.c
+++ b/drivers/media/usb/gspca/gspca.c
@@ -1257,7 +1257,7 @@ static int vidioc_g_parm(struct file *filp, void *priv,
 {
 	struct gspca_dev *gspca_dev = video_drvdata(filp);
 
-	parm->parm.capture.readbuffers = gspca_dev->queue.min_buffers_needed;
+	parm->parm.capture.readbuffers = gspca_dev->queue.min_reqbufs_allocation;
 
 	if (!gspca_dev->sd_desc->get_streamparm)
 		return 0;
@@ -1273,7 +1273,7 @@ static int vidioc_s_parm(struct file *filp, void *priv,
 {
 	struct gspca_dev *gspca_dev = video_drvdata(filp);
 
-	parm->parm.capture.readbuffers = gspca_dev->queue.min_buffers_needed;
+	parm->parm.capture.readbuffers = gspca_dev->queue.min_reqbufs_allocation;
 
 	if (!gspca_dev->sd_desc->set_streamparm) {
 		parm->parm.capture.capability = 0;
@@ -1517,7 +1517,7 @@ int gspca_dev_probe2(struct usb_interface *intf,
 	q->ops = &gspca_qops;
 	q->mem_ops = &vb2_vmalloc_memops;
 	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
-	q->min_buffers_needed = 2;
+	q->min_reqbufs_allocation = 2;
 	q->lock = &gspca_dev->usb_lock;
 	ret = vb2_queue_init(q);
 	if (ret)
-- 
2.39.2