[PATCH AUTOSEL 5.10 01/37] media: staging: media: zoran: move videodev alloc

Sasha Levin
2022-03-30T12:06:49Z

From: Corentin Labbe <clabbe@baylibre.com>

[ Upstream commit 82e3a496eb56da0b9f29fdc5b63cedb3289e91de ]

Move some code out of zr36057_init() and create new functions for handling
zr->video_dev. This permit to ease code reading and fix a zr->video_dev
memory leak.

Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/staging/media/zoran/zoran.h | 2 +-
drivers/staging/media/zoran/zoran_card.c | 80 ++++++++++++++--------
drivers/staging/media/zoran/zoran_driver.c | 5 +-
3 files changed, 54 insertions(+), 33 deletions(-)

diff --git a/drivers/staging/media/zoran/zoran.h b/drivers/staging/media/zoran/zoran.h
index e7fe8da7732c..3f223e5b1872 100644
--- a/drivers/staging/media/zoran/zoran.h
+++ b/drivers/staging/media/zoran/zoran.h
@@ -314,6 +314,6 @@ static inline struct zoran *to_zoran(struct v4l2_device *v4l2_dev)

#endif

-int zoran_queue_init(struct zoran *zr, struct vb2_queue *vq);
+int zoran_queue_init(struct zoran *zr, struct vb2_queue *vq, int dir);
void zoran_queue_exit(struct zoran *zr);
int zr_set_buf(struct zoran *zr);
diff --git a/drivers/staging/media/zoran/zoran_card.c b/drivers/staging/media/zoran/zoran_card.c
index dfc60e2e9dd7..e4df72cd4d28 100644
--- a/drivers/staging/media/zoran/zoran_card.c
+++ b/drivers/staging/media/zoran/zoran_card.c
@@ -802,6 +802,52 @@ int zoran_check_jpg_settings(struct zoran *zr,
return 0;
}

+static int zoran_init_video_device(struct zoran *zr, struct video_device *video_dev, int dir)
+{
+ int err;
+
+ /* Now add the template and register the device unit. */
+ *video_dev = zoran_template;
+ video_dev->v4l2_dev = &zr->v4l2_dev;
+ video_dev->lock = &zr->lock;
+ video_dev->device_caps = V4L2_CAP_STREAMING | dir;
+
+ strscpy(video_dev->name, ZR_DEVNAME(zr), sizeof(video_dev->name));
+ /*
+ * It's not a mem2mem device, but you can both capture and output from one and the same
+ * device. This should really be split up into two device nodes, but that's a job for
+ * another day.
+ */
+ video_dev->vfl_dir = VFL_DIR_M2M;
+ zoran_queue_init(zr, &zr->vq, V4L2_BUF_TYPE_VIDEO_CAPTURE);
+
+ err = video_register_device(video_dev, VFL_TYPE_VIDEO, video_nr[zr->id]);
+ if (err < 0)
+ return err;
+ video_set_drvdata(video_dev, zr);
+ return 0;
+}
+
+static void zoran_exit_video_devices(struct zoran *zr)
+{
+ video_unregister_device(zr->video_dev);
+ kfree(zr->video_dev);
+}
+
+static int zoran_init_video_devices(struct zoran *zr)
+{
+ int err;
+
+ zr->video_dev = video_device_alloc();
+ if (!zr->video_dev)
+ return -ENOMEM;
+
+ err = zoran_init_video_device(zr, zr->video_dev, V4L2_CAP_VIDEO_CAPTURE);
+ if (err)
+ kfree(zr->video_dev);
+ return err;
+}
+
void zoran_open_init_params(struct zoran *zr)
{
int i;
@@ -873,17 +919,11 @@ static int zr36057_init(struct zoran *zr)
zoran_open_init_params(zr);

/* allocate memory *before* doing anything to the hardware in case allocation fails */
- zr->video_dev = video_device_alloc();
- if (!zr->video_dev) {
- err = -ENOMEM;
- goto exit;
- }
zr->stat_com = dma_alloc_coherent(&zr->pci_dev->dev,
BUZ_NUM_STAT_COM * sizeof(u32),
&zr->p_sc, GFP_KERNEL);
if (!zr->stat_com) {
- err = -ENOMEM;
- goto exit_video;
+ return -ENOMEM;
}
for (j = 0; j < BUZ_NUM_STAT_COM; j++)
zr->stat_com[j] = cpu_to_le32(1); /* mark as unavailable to zr36057 */
@@ -896,26 +936,9 @@ static int zr36057_init(struct zoran *zr)
goto exit_statcom;
}

- /* Now add the template and register the device unit. */
- *zr->video_dev = zoran_template;
- zr->video_dev->v4l2_dev = &zr->v4l2_dev;
- zr->video_dev->lock = &zr->lock;
- zr->video_dev->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE;
-
- strscpy(zr->video_dev->name, ZR_DEVNAME(zr), sizeof(zr->video_dev->name));
- /*
- * It's not a mem2mem device, but you can both capture and output from one and the same
- * device. This should really be split up into two device nodes, but that's a job for
- * another day.
- */
- zr->video_dev->vfl_dir = VFL_DIR_M2M;
-
- zoran_queue_init(zr, &zr->vq);
-
- err = video_register_device(zr->video_dev, VFL_TYPE_VIDEO, video_nr[zr->id]);
- if (err < 0)
+ err = zoran_init_video_devices(zr);
+ if (err)
goto exit_statcomb;
- video_set_drvdata(zr->video_dev, zr);

zoran_init_hardware(zr);
if (!pass_through) {
@@ -930,9 +953,6 @@ static int zr36057_init(struct zoran *zr)
dma_free_coherent(&zr->pci_dev->dev, BUZ_NUM_STAT_COM * sizeof(u32) * 2, zr->stat_comb, zr->p_scb);
exit_statcom:
dma_free_coherent(&zr->pci_dev->dev, BUZ_NUM_STAT_COM * sizeof(u32), zr->stat_com, zr->p_sc);
-exit_video:
- kfree(zr->video_dev);
-exit:
return err;
}

@@ -964,7 +984,7 @@ static void zoran_remove(struct pci_dev *pdev)
dma_free_coherent(&zr->pci_dev->dev, BUZ_NUM_STAT_COM * sizeof(u32) * 2, zr->stat_comb, zr->p_scb);
pci_release_regions(pdev);
pci_disable_device(zr->pci_dev);
- video_unregister_device(zr->video_dev);
+ zoran_exit_video_devices(zr);
exit_free:
v4l2_ctrl_handler_free(&zr->hdl);
v4l2_device_unregister(&zr->v4l2_dev);
diff --git a/drivers/staging/media/zoran/zoran_driver.c b/drivers/staging/media/zoran/zoran_driver.c
index 808196ea5b81..7f22596cc630 100644
--- a/drivers/staging/media/zoran/zoran_driver.c
+++ b/drivers/staging/media/zoran/zoran_driver.c
@@ -1006,7 +1006,7 @@ static const struct vb2_ops zr_video_qops = {
.wait_finish = vb2_ops_wait_finish,
};

-int zoran_queue_init(struct zoran *zr, struct vb2_queue *vq)
+int zoran_queue_init(struct zoran *zr, struct vb2_queue *vq, int dir)
{
int err;

@@ -1014,7 +1014,8 @@ int zoran_queue_init(struct zoran *zr, struct vb2_queue *vq)
INIT_LIST_HEAD(&zr->queued_bufs);

vq->dev = &zr->pci_dev->dev;
- vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ vq->type = dir;
+
vq->io_modes = VB2_USERPTR | VB2_DMABUF | VB2_MMAP | VB2_READ | VB2_WRITE;
vq->drv_priv = zr;
vq->buf_struct_size = sizeof(struct zr_buffer);
--
2.34.1