From patchwork Wed Jan 5 16:42:39 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans Verkuil X-Patchwork-Id: 453851 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id p05GgxQO017110 for ; Wed, 5 Jan 2011 16:43:02 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751694Ab1AEQnA (ORCPT ); Wed, 5 Jan 2011 11:43:00 -0500 Received: from smtp-vbr12.xs4all.nl ([194.109.24.32]:1172 "EHLO smtp-vbr12.xs4all.nl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751508Ab1AEQm7 (ORCPT ); Wed, 5 Jan 2011 11:42:59 -0500 Received: from localhost.localdomain (43.80-203-71.nextgentel.com [80.203.71.43]) (authenticated bits=0) by smtp-vbr12.xs4all.nl (8.13.8/8.13.8) with ESMTP id p05GghlQ065318 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 5 Jan 2011 17:42:53 +0100 (CET) (envelope-from hverkuil@xs4all.nl) From: Hans Verkuil To: linux-media@vger.kernel.org Cc: nsekhar@ti.com, manjunath.hadli@ti.com, Hans Verkuil Subject: [RFC PATCH 1/2] davinci: convert vpif_capture to core-assisted locking Date: Wed, 5 Jan 2011 17:42:39 +0100 Message-Id: <322ed2dee70fc3e42f144410eb822d2e4d84c1d8.1294245475.git.hverkuil@xs4all.nl> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1294245760-2803-1-git-send-email-hverkuil@xs4all.nl> References: <1294245760-2803-1-git-send-email-hverkuil@xs4all.nl> X-Virus-Scanned: by XS4ALL Virus Scanner Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter1.kernel.org [140.211.167.41]); Wed, 05 Jan 2011 16:43:02 +0000 (UTC) diff --git a/drivers/media/video/davinci/vpif_capture.c b/drivers/media/video/davinci/vpif_capture.c index f8e6590..d93ad74 100644 --- a/drivers/media/video/davinci/vpif_capture.c +++ b/drivers/media/video/davinci/vpif_capture.c @@ -752,7 +752,7 @@ static int vpif_open(struct file *filep) struct video_obj *vid_ch; struct channel_obj *ch; struct vpif_fh *fh; - int i, ret = 0; + int i; vpif_dbg(2, debug, "vpif_open\n"); @@ -761,9 +761,6 @@ static int vpif_open(struct file *filep) vid_ch = &ch->video; common = &ch->common[VPIF_VIDEO_INDEX]; - if (mutex_lock_interruptible(&common->lock)) - return -ERESTARTSYS; - if (NULL == ch->curr_subdev_info) { /** * search through the sub device to see a registered @@ -780,8 +777,7 @@ static int vpif_open(struct file *filep) } if (i == config->subdev_count) { vpif_err("No sub device registered\n"); - ret = -ENOENT; - goto exit; + return -ENOENT; } } @@ -789,8 +785,7 @@ static int vpif_open(struct file *filep) fh = kzalloc(sizeof(struct vpif_fh), GFP_KERNEL); if (NULL == fh) { vpif_err("unable to allocate memory for file handle object\n"); - ret = -ENOMEM; - goto exit; + return -ENOMEM; } /* store pointer to fh in private_data member of filep */ @@ -810,9 +805,7 @@ static int vpif_open(struct file *filep) /* Initialize priority of this instance to default priority */ fh->prio = V4L2_PRIORITY_UNSET; v4l2_prio_open(&ch->prio, &fh->prio); -exit: - mutex_unlock(&common->lock); - return ret; + return 0; } /** @@ -832,9 +825,6 @@ static int vpif_release(struct file *filep) common = &ch->common[VPIF_VIDEO_INDEX]; - if (mutex_lock_interruptible(&common->lock)) - return -ERESTARTSYS; - /* if this instance is doing IO */ if (fh->io_allowed[VPIF_VIDEO_INDEX]) { /* Reset io_usrs member of channel object */ @@ -858,9 +848,6 @@ static int vpif_release(struct file *filep) /* Decrement channel usrs counter */ ch->usrs--; - /* unlock mutex on channel object */ - mutex_unlock(&common->lock); - /* Close the priority */ v4l2_prio_close(&ch->prio, fh->prio); @@ -885,7 +872,6 @@ static int vpif_reqbufs(struct file *file, void *priv, struct channel_obj *ch = fh->channel; struct common_obj *common; u8 index = 0; - int ret = 0; vpif_dbg(2, debug, "vpif_reqbufs\n"); @@ -908,13 +894,8 @@ static int vpif_reqbufs(struct file *file, void *priv, common = &ch->common[index]; - if (mutex_lock_interruptible(&common->lock)) - return -ERESTARTSYS; - - if (0 != common->io_usrs) { - ret = -EBUSY; - goto reqbuf_exit; - } + if (0 != common->io_usrs) + return -EBUSY; /* Initialize videobuf queue as per the buffer type */ videobuf_queue_dma_contig_init(&common->buffer_queue, @@ -923,7 +904,7 @@ static int vpif_reqbufs(struct file *file, void *priv, reqbuf->type, common->fmt.fmt.pix.field, sizeof(struct videobuf_buffer), fh, - NULL); + &common->lock); /* Set io allowed member of file handle to TRUE */ fh->io_allowed[index] = 1; @@ -934,11 +915,7 @@ static int vpif_reqbufs(struct file *file, void *priv, INIT_LIST_HEAD(&common->dma_queue); /* Allocate buffers */ - ret = videobuf_reqbufs(&common->buffer_queue, reqbuf); - -reqbuf_exit: - mutex_unlock(&common->lock); - return ret; + return videobuf_reqbufs(&common->buffer_queue, reqbuf); } /** @@ -1152,11 +1129,6 @@ static int vpif_streamon(struct file *file, void *priv, return ret; } - if (mutex_lock_interruptible(&common->lock)) { - ret = -ERESTARTSYS; - goto streamoff_exit; - } - /* If buffer queue is empty, return error */ if (list_empty(&common->dma_queue)) { vpif_dbg(1, debug, "buffer queue is empty\n"); @@ -1235,13 +1207,10 @@ static int vpif_streamon(struct file *file, void *priv, enable_channel1(1); } channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1; - mutex_unlock(&common->lock); return ret; exit: - mutex_unlock(&common->lock); -streamoff_exit: - ret = videobuf_streamoff(&common->buffer_queue); + videobuf_streamoff(&common->buffer_queue); return ret; } @@ -1279,9 +1248,6 @@ static int vpif_streamoff(struct file *file, void *priv, return -EINVAL; } - if (mutex_lock_interruptible(&common->lock)) - return -ERESTARTSYS; - /* disable channel */ if (VPIF_CHANNEL0_VIDEO == ch->channel_id) { enable_channel0(0); @@ -1299,8 +1265,6 @@ static int vpif_streamoff(struct file *file, void *priv, if (ret && (ret != -ENOIOCTLCMD)) vpif_dbg(1, debug, "stream off failed in subdev\n"); - mutex_unlock(&common->lock); - return videobuf_streamoff(&common->buffer_queue); } @@ -1376,21 +1340,16 @@ static int vpif_querystd(struct file *file, void *priv, v4l2_std_id *std_id) { struct vpif_fh *fh = priv; struct channel_obj *ch = fh->channel; - struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; int ret = 0; vpif_dbg(2, debug, "vpif_querystd\n"); - if (mutex_lock_interruptible(&common->lock)) - return -ERESTARTSYS; - /* Call querystd function of decoder device */ ret = v4l2_subdev_call(vpif_obj.sd[ch->curr_sd_index], video, querystd, std_id); if (ret < 0) vpif_dbg(1, debug, "Failed to set standard for sub devices\n"); - mutex_unlock(&common->lock); return ret; } @@ -1446,18 +1405,14 @@ static int vpif_s_std(struct file *file, void *priv, v4l2_std_id *std_id) fh->initialized = 1; /* Call encoder subdevice function to set the standard */ - if (mutex_lock_interruptible(&common->lock)) - return -ERESTARTSYS; - ch->video.stdid = *std_id; ch->video.dv_preset = V4L2_DV_INVALID; memset(&ch->video.bt_timings, 0, sizeof(ch->video.bt_timings)); /* Get the information about the standard */ if (vpif_update_std_info(ch)) { - ret = -EINVAL; vpif_err("Error getting the standard info\n"); - goto s_std_exit; + return -EINVAL; } /* Configure the default format information */ @@ -1468,9 +1423,6 @@ static int vpif_s_std(struct file *file, void *priv, v4l2_std_id *std_id) s_std, *std_id); if (ret < 0) vpif_dbg(1, debug, "Failed to set standard for sub devices\n"); - -s_std_exit: - mutex_unlock(&common->lock); return ret; } @@ -1564,9 +1516,6 @@ static int vpif_s_input(struct file *file, void *priv, unsigned int index) return -EINVAL; } - if (mutex_lock_interruptible(&common->lock)) - return -ERESTARTSYS; - /* first setup input path from sub device to vpif */ if (config->setup_input_path) { ret = config->setup_input_path(ch->channel_id, @@ -1575,7 +1524,7 @@ static int vpif_s_input(struct file *file, void *priv, unsigned int index) vpif_dbg(1, debug, "couldn't setup input path for the" " sub device %s, for input index %d\n", subdev_info->name, index); - goto exit; + return ret; } } @@ -1586,7 +1535,7 @@ static int vpif_s_input(struct file *file, void *priv, unsigned int index) input, output, 0); if (ret < 0) { vpif_dbg(1, debug, "Failed to set input\n"); - goto exit; + return ret; } } vid_ch->input_idx = index; @@ -1597,9 +1546,6 @@ static int vpif_s_input(struct file *file, void *priv, unsigned int index) /* update tvnorms from the sub device input info */ ch->video_dev->tvnorms = chan_cfg->inputs[index].input.std; - -exit: - mutex_unlock(&common->lock); return ret; } @@ -1668,11 +1614,7 @@ static int vpif_g_fmt_vid_cap(struct file *file, void *priv, return -EINVAL; /* Fill in the information about format */ - if (mutex_lock_interruptible(&common->lock)) - return -ERESTARTSYS; - *fmt = common->fmt; - mutex_unlock(&common->lock); return 0; } @@ -1720,12 +1662,7 @@ static int vpif_s_fmt_vid_cap(struct file *file, void *priv, if (ret) return ret; /* store the format in the channel object */ - if (mutex_lock_interruptible(&common->lock)) - return -ERESTARTSYS; - common->fmt = *fmt; - mutex_unlock(&common->lock); - return 0; } @@ -2145,7 +2082,7 @@ static struct v4l2_file_operations vpif_fops = { .owner = THIS_MODULE, .open = vpif_open, .release = vpif_release, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, .mmap = vpif_mmap, .poll = vpif_poll }; @@ -2288,6 +2225,7 @@ static __init int vpif_probe(struct platform_device *pdev) common = &(ch->common[VPIF_VIDEO_INDEX]); spin_lock_init(&common->irqlock); mutex_init(&common->lock); + ch->video_dev->lock = &common->lock; /* Initialize prio member of channel object */ v4l2_prio_init(&ch->prio); err = video_register_device(ch->video_dev,