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[80.71.134.83]) by smtp.gmail.com with ESMTPSA id gv36sm840753ejc.94.2022.02.04.09.07.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 04 Feb 2022 09:07:47 -0800 (PST) From: Ricardo Ribalda To: Laurent Pinchart , Mauro Carvalho Chehab , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, Tomasz Figa , Sergey Senozhatsky Cc: Ricardo Ribalda Subject: [PATCH v4 2/3] media: uvcvideo: Refactor streamon/streamoff Date: Fri, 4 Feb 2022 18:07:44 +0100 Message-Id: <20220204170745.1269482-2-ribalda@chromium.org> X-Mailer: git-send-email 2.35.0.263.gb82422642f-goog In-Reply-To: <20220204170745.1269482-1-ribalda@chromium.org> References: <20220204170745.1269482-1-ribalda@chromium.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Add a new variable to handle the streaming state and handle the streamoff errors, that were not handled before. Signed-off-by: Ricardo Ribalda --- drivers/media/usb/uvc/uvc_v4l2.c | 19 ++++++++++++++++--- drivers/media/usb/uvc/uvcvideo.h | 1 + 2 files changed, 17 insertions(+), 3 deletions(-) diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c index 711556d13d03..ae1f221b2a5d 100644 --- a/drivers/media/usb/uvc/uvc_v4l2.c +++ b/drivers/media/usb/uvc/uvc_v4l2.c @@ -836,13 +836,19 @@ static int uvc_ioctl_streamon(struct file *file, void *fh, { struct uvc_fh *handle = fh; struct uvc_streaming *stream = handle->stream; - int ret; + int ret = -EBUSY; if (!uvc_has_privileges(handle)) return -EBUSY; mutex_lock(&stream->mutex); + + if (handle->is_streaming) + goto unlock; ret = uvc_queue_streamon(&stream->queue, type); + handle->is_streaming = !ret; + +unlock: mutex_unlock(&stream->mutex); return ret; @@ -853,15 +859,22 @@ static int uvc_ioctl_streamoff(struct file *file, void *fh, { struct uvc_fh *handle = fh; struct uvc_streaming *stream = handle->stream; + int ret = 0; if (!uvc_has_privileges(handle)) return -EBUSY; mutex_lock(&stream->mutex); - uvc_queue_streamoff(&stream->queue, type); + + if (!handle->is_streaming) + goto unlock; + ret = uvc_queue_streamoff(&stream->queue, type); + handle->is_streaming = !!ret; + +unlock: mutex_unlock(&stream->mutex); - return 0; + return ret; } static int uvc_ioctl_enum_input(struct file *file, void *fh, diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h index 143230b3275b..5958b2a54dab 100644 --- a/drivers/media/usb/uvc/uvcvideo.h +++ b/drivers/media/usb/uvc/uvcvideo.h @@ -720,6 +720,7 @@ enum uvc_handle_state { struct uvc_fh { struct v4l2_fh vfh; + bool is_streaming; struct uvc_video_chain *chain; struct uvc_streaming *stream; enum uvc_handle_state state;