Re: [PATCH] staging: pi433: add rw semaphore fixing concurrency issues

June 1, 2018


      Hi Valdis,
...
...
@@ -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.
Oh right, no curly braces, didn't notice it. Thanks !

Otherwise, do you think the usage of rw semaphore is appropriate in this
case ?

Regards,
 Hugo

-- 
             Hugo Lefeuvre (hle)    |    www.owl.eu.com
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