diff options
Diffstat (limited to 'drivers/media/video/bw-qcam.c')
| -rw-r--r-- | drivers/media/video/bw-qcam.c | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/drivers/media/video/bw-qcam.c b/drivers/media/video/bw-qcam.c index 6e39e253ce5..ace4ff9ea02 100644 --- a/drivers/media/video/bw-qcam.c +++ b/drivers/media/video/bw-qcam.c @@ -495,7 +495,7 @@ static void qc_set(struct qcam_device *q) val2 = (((q->port_mode & QC_MODE_MASK) == QC_BIDIR) ? 24 : 8) * q->transfer_scale; } - val = (val + val2 - 1) / val2; + val = DIV_ROUND_UP(val, val2); qc_command(q, 0x13); qc_command(q, val); @@ -651,7 +651,7 @@ static long qc_capture(struct qcam_device * q, char __user *buf, unsigned long l transperline = q->width * q->bpp; divisor = (((q->port_mode & QC_MODE_MASK) == QC_BIDIR) ? 24 : 8) * q->transfer_scale; - transperline = (transperline + divisor - 1) / divisor; + transperline = DIV_ROUND_UP(transperline, divisor); for (i = 0, yield = yieldlines; i < linestotrans; i++) { @@ -894,10 +894,27 @@ static ssize_t qcam_read(struct file *file, char __user *buf, return len; } +static int qcam_exclusive_open(struct inode *inode, struct file *file) +{ + struct video_device *dev = video_devdata(file); + struct qcam_device *qcam = (struct qcam_device *)dev; + + return test_and_set_bit(0, &qcam->in_use) ? -EBUSY : 0; +} + +static int qcam_exclusive_release(struct inode *inode, struct file *file) +{ + struct video_device *dev = video_devdata(file); + struct qcam_device *qcam = (struct qcam_device *)dev; + + clear_bit(0, &qcam->in_use); + return 0; +} + static const struct file_operations qcam_fops = { .owner = THIS_MODULE, - .open = video_exclusive_open, - .release = video_exclusive_release, + .open = qcam_exclusive_open, + .release = qcam_exclusive_release, .ioctl = qcam_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl = v4l_compat_ioctl32, @@ -909,6 +926,7 @@ static struct video_device qcam_template= { .name = "Connectix Quickcam", .fops = &qcam_fops, + .release = video_device_release_empty, }; #define MAX_CAMS 4 |