From: Sakari Ailus <sakari.ailus@linux.intel.com>
To: linux-media@vger.kernel.org
Cc: laurent.pinchart@ideasonboard.com, hverkuil@xs4all.nl,
mchehab@osg.samsung.com
Subject: [RFC v2 04/21] media: Only requests in IDLE state may be deleted
Date: Tue, 24 May 2016 19:47:14 +0300 [thread overview]
Message-ID: <1464108451-28142-5-git-send-email-sakari.ailus@linux.intel.com> (raw)
In-Reply-To: <1464108451-28142-1-git-send-email-sakari.ailus@linux.intel.com>
Prevent deleting queued requests. Also mark deleted requests as such by
adding a new state for them.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
drivers/media/media-device.c | 21 +++++++++++++++++----
include/media/media-device.h | 1 +
2 files changed, 18 insertions(+), 4 deletions(-)
diff --git a/drivers/media/media-device.c b/drivers/media/media-device.c
index 247587b..a89d046 100644
--- a/drivers/media/media-device.c
+++ b/drivers/media/media-device.c
@@ -41,6 +41,7 @@
static char *__request_state[] = {
"IDLE",
"QUEUED",
+ "DELETED",
};
#define request_state(i) \
@@ -168,12 +169,22 @@ out_ida_simple_remove:
return ret;
}
-static void media_device_request_delete(struct media_device *mdev,
- struct media_device_request *req)
+static int media_device_request_delete(struct media_device *mdev,
+ struct media_device_request *req)
{
unsigned long flags;
spin_lock_irqsave(&mdev->req_lock, flags);
+
+ if (req->state != MEDIA_DEVICE_REQUEST_STATE_IDLE) {
+ spin_unlock_irqrestore(&mdev->req_lock, flags);
+ dev_dbg(mdev->dev, "request: can't delete %u, state %s\n",
+ req->id, request_state(req->state));
+ return -EINVAL;
+ }
+
+ req->state = MEDIA_DEVICE_REQUEST_STATE_DELETED;
+
if (req->filp) {
/*
* If the file handle is gone by now the
@@ -184,9 +195,12 @@ static void media_device_request_delete(struct media_device *mdev,
list_del(&req->fh_list);
req->filp = NULL;
}
+
spin_unlock_irqrestore(&mdev->req_lock, flags);
media_device_request_put(req);
+
+ return 0;
}
static int media_device_request_queue_apply(
@@ -252,8 +266,7 @@ static long media_device_request_cmd(struct media_device *mdev,
break;
case MEDIA_REQ_CMD_DELETE:
- media_device_request_delete(mdev, req);
- ret = 0;
+ ret = media_device_request_delete(mdev, req);
break;
case MEDIA_REQ_CMD_APPLY:
diff --git a/include/media/media-device.h b/include/media/media-device.h
index 893e10b..df4afeb 100644
--- a/include/media/media-device.h
+++ b/include/media/media-device.h
@@ -268,6 +268,7 @@ struct media_device;
enum media_device_request_state {
MEDIA_DEVICE_REQUEST_STATE_IDLE,
MEDIA_DEVICE_REQUEST_STATE_QUEUED,
+ MEDIA_DEVICE_REQUEST_STATE_DELETED,
};
/**
--
1.9.1
next prev parent reply other threads:[~2016-05-24 16:50 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-24 16:47 [RFC v2 0/21] Media request API Sakari Ailus
2016-05-24 16:47 ` [RFC v2 01/21] media: Add " Sakari Ailus
2016-05-24 16:47 ` [RFC v2 02/21] media: Add media device request state Sakari Ailus
2016-05-24 16:47 ` [RFC v2 03/21] media: Prevent queueing queued requests Sakari Ailus
2016-05-24 16:47 ` Sakari Ailus [this message]
2016-05-24 16:47 ` [RFC v2 05/21] media: Add media_device_request_complete() to mark requests complete Sakari Ailus
2016-05-24 16:47 ` [RFC v2 06/21] media: Add per-entity request data support Sakari Ailus
2016-05-24 16:47 ` [RFC v2 07/21] videodev2.h: Add request field to v4l2_buffer Sakari Ailus
2016-05-24 16:47 ` [RFC v2 08/21] videodev2.h: Add request field to v4l2_pix_format_mplane Sakari Ailus
2016-05-24 16:47 ` [RFC v2 09/21] v4l2-subdev.h: Add request field to format and selection structures Sakari Ailus
2016-05-24 16:47 ` [RFC v2 10/21] v4l: Support the request API in format operations Sakari Ailus
2016-05-24 16:47 ` [RFC v2 11/21] v4l: subdev: Support the request API in format and selection operations Sakari Ailus
2016-05-24 16:47 ` [RFC v2 12/21] vb2: Add allow_requests flag Sakari Ailus
2016-05-24 16:47 ` [RFC v2 13/21] media: Add MEDIA_IOC_DQEVENT Sakari Ailus
2016-05-24 16:47 ` [RFC v2 14/21] media: Make events on request completion optional, disabled by default Sakari Ailus
2016-05-24 16:47 ` [RFC v2 15/21] media: Add poll support Sakari Ailus
2016-05-24 16:47 ` [RFC v2 16/21] DocBook: media: Document the media request API Sakari Ailus
2016-05-24 16:47 ` [RFC v2 17/21] DocBook: media: Document the V4L2 " Sakari Ailus
2016-05-24 16:47 ` [RFC v2 18/21] DocBook: media: Document the subdev selection API Sakari Ailus
2016-05-24 16:47 ` [RFC v2 19/21] DocBook: media: Document the V4L2 subdev request API Sakari Ailus
2016-05-24 16:47 ` [RFC v2 20/21] DocBook: media: Document media events (MEDIA_IOC_DQEVENT IOCTL) Sakari Ailus
2016-05-24 16:47 ` [RFC v2 21/21] DocBook: media: Document request flags Sakari Ailus
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