* [git:media_tree/master] media: ipu3-cio2: Serialise access to pad format
@ 2020-11-05 16:39 Mauro Carvalho Chehab
0 siblings, 0 replies; only message in thread
From: Mauro Carvalho Chehab @ 2020-11-05 16:39 UTC (permalink / raw
To: linuxtv-commits
Cc: Andy Shevchenko, Bingbu Cao, Sakari Ailus, stable,
Laurent Pinchart
This is an automatic generated email to let you know that the following patch were queued:
Subject: media: ipu3-cio2: Serialise access to pad format
Author: Sakari Ailus <sakari.ailus@linux.intel.com>
Date: Thu Oct 8 21:29:38 2020 +0200
Pad format can be accessed from user space. Serialise access to it.
Fixes: c2a6a07afe4a ("media: intel-ipu3: cio2: add new MIPI-CSI2 driver")
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Bingbu Cao <bingbu.cao@intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: stable@vger.kernel.org # v4.16 and up
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
drivers/media/pci/intel/ipu3/ipu3-cio2.c | 11 +++++++++++
drivers/media/pci/intel/ipu3/ipu3-cio2.h | 1 +
2 files changed, 12 insertions(+)
---
diff --git a/drivers/media/pci/intel/ipu3/ipu3-cio2.c b/drivers/media/pci/intel/ipu3/ipu3-cio2.c
index afa472026ba4..b3a08196e08c 100644
--- a/drivers/media/pci/intel/ipu3/ipu3-cio2.c
+++ b/drivers/media/pci/intel/ipu3/ipu3-cio2.c
@@ -1233,11 +1233,15 @@ static int cio2_subdev_get_fmt(struct v4l2_subdev *sd,
{
struct cio2_queue *q = container_of(sd, struct cio2_queue, subdev);
+ mutex_lock(&q->subdev_lock);
+
if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
fmt->format = *v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
else
fmt->format = q->subdev_fmt;
+ mutex_unlock(&q->subdev_lock);
+
return 0;
}
@@ -1261,6 +1265,8 @@ static int cio2_subdev_set_fmt(struct v4l2_subdev *sd,
if (fmt->pad == CIO2_PAD_SOURCE)
return cio2_subdev_get_fmt(sd, cfg, fmt);
+ mutex_lock(&q->subdev_lock);
+
if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
*v4l2_subdev_get_try_format(sd, cfg, fmt->pad) = fmt->format;
} else {
@@ -1271,6 +1277,8 @@ static int cio2_subdev_set_fmt(struct v4l2_subdev *sd,
fmt->format = q->subdev_fmt;
}
+ mutex_unlock(&q->subdev_lock);
+
return 0;
}
@@ -1529,6 +1537,7 @@ static int cio2_queue_init(struct cio2_device *cio2, struct cio2_queue *q)
/* Initialize miscellaneous variables */
mutex_init(&q->lock);
+ mutex_init(&q->subdev_lock);
/* Initialize formats to default values */
fmt = &q->subdev_fmt;
@@ -1645,6 +1654,7 @@ fail_vdev_media_entity:
fail_subdev_media_entity:
cio2_fbpt_exit(q, &cio2->pci_dev->dev);
fail_fbpt:
+ mutex_destroy(&q->subdev_lock);
mutex_destroy(&q->lock);
return r;
@@ -1657,6 +1667,7 @@ static void cio2_queue_exit(struct cio2_device *cio2, struct cio2_queue *q)
v4l2_device_unregister_subdev(&q->subdev);
media_entity_cleanup(&q->subdev.entity);
cio2_fbpt_exit(q, &cio2->pci_dev->dev);
+ mutex_destroy(&q->subdev_lock);
mutex_destroy(&q->lock);
}
diff --git a/drivers/media/pci/intel/ipu3/ipu3-cio2.h b/drivers/media/pci/intel/ipu3/ipu3-cio2.h
index 549b08f88f0c..146492383aa5 100644
--- a/drivers/media/pci/intel/ipu3/ipu3-cio2.h
+++ b/drivers/media/pci/intel/ipu3/ipu3-cio2.h
@@ -335,6 +335,7 @@ struct cio2_queue {
/* Subdev, /dev/v4l-subdevX */
struct v4l2_subdev subdev;
+ struct mutex subdev_lock; /* Serialise acces to subdev_fmt field */
struct media_pad subdev_pads[CIO2_PADS];
struct v4l2_mbus_framefmt subdev_fmt;
atomic_t frame_sequence;
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2020-11-05 16:39 [git:media_tree/master] media: ipu3-cio2: Serialise access to pad format Mauro Carvalho Chehab
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