On Fri, 01 Jun 2018 08:50:37 -0400, Hugo Lefeuvre said:
> @@ -805,9 +809,11 @@ pi433_read(struct file *filp, char __user *buf, size_t size, loff_t *f_pos)
> if (bytes_received > 0) {
> retval = copy_to_user(buf, device->rx_buffer, bytes_received);
> if (retval)
> + up_read(&instance->instance_sem);
> return -EFAULT;
> }
>
> + up_read(&instance->instance_sem);
> return bytes_received;
> }
This doesn't do what you think.
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