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add safety checks

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This commit is contained in:
internal 2023-11-03 13:39:54 +01:00
parent d63916cba1
commit de5051a85a
1 changed files with 14 additions and 7 deletions
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21
ddbridge/ddbridge-core.c
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@ -974,12 +974,16 @@ static unsigned int ts_poll(struct file *file, poll_table *wait)
unsigned int mask = 0;
poll_wait(file, &input->dma->wq, wait);
poll_wait(file, &output->dma->wq, wait);
if (ddb_input_avail(input) >= 188)
mask |= POLLIN | POLLRDNORM;
if (ddb_output_free(output) >= 188)
mask |= POLLOUT | POLLWRNORM;
if (input && input->dma) {
poll_wait(file, &input->dma->wq, wait);
if (ddb_input_avail(input) >= 188)
mask |= POLLIN | POLLRDNORM;
}
if (output && output->dma) {
poll_wait(file, &output->dma->wq, wait);
if (ddb_output_free(output) >= 188)
mask |= POLLOUT | POLLWRNORM;
}
return mask;
}
@ -1006,8 +1010,11 @@ static int ts_open(struct inode *inode, struct file *file)
int err;
struct dvb_device *dvbdev = file->private_data;
struct ddb_output *output = dvbdev->priv;
struct ddb_input *input = output->port->input[0];
struct ddb_input *input;
if (!output)
return -EINVAL;
input = output->port->input[0];
if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
if (!input)
return -EINVAL;