From 155e2f8c4066b1061fd9151563f9b1c7095f72b9 Mon Sep 17 00:00:00 2001
From: Matthias Fulz <mfulz@olznet.de>
Date: Fri, 26 Jul 2019 12:27:48 +0200
Subject: [PATCH] fix: #531 #537. Better handling of EPIPE during hid write.

---
 lib/hidapi/udev.py                | 14 +++++++++++---
 lib/logitech_receiver/receiver.py |  2 +-
 2 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/lib/hidapi/udev.py b/lib/hidapi/udev.py
index abcd8113..f0d76d5c 100644
--- a/lib/hidapi/udev.py
+++ b/lib/hidapi/udev.py
@@ -260,9 +260,17 @@ def write(device_handle, data):
 	assert device_handle
 	assert data
 	assert isinstance(data, bytes), (repr(data), type(data))
-	bytes_written = _os.write(device_handle, data)
-	if bytes_written != len(data):
-		raise IOError(_errno.EIO, 'written %d bytes out of expected %d' % (bytes_written, len(data)))
+	retrycount = 0
+	while(True and retrycount < 3):
+		try:
+			bytes_written = _os.write(device_handle, data)
+			if bytes_written != len(data):
+				raise IOError(_errno.EIO, 'written %d bytes out of expected %d' % (bytes_written, len(data)))
+		except IOError as e:
+			if e.errno != _errno.EPIPE:
+				raise e
+			retrycount += 1
+			continue
 
 
 def read(device_handle, bytes_count, timeout_ms=-1):
diff --git a/lib/logitech_receiver/receiver.py b/lib/logitech_receiver/receiver.py
index 30ee460a..92414b24 100644
--- a/lib/logitech_receiver/receiver.py
+++ b/lib/logitech_receiver/receiver.py
@@ -345,7 +345,7 @@ class Receiver(object):
 			self.serial = 0
 			self.max_devices = 6
 
-		if self.product_id == 'c539' or slef.product_id == 'c53a':
+		if self.product_id == 'c539' or self.product_id == 'c53a':
 			self.name = 'Lightspeed Receiver'
 		elif self.max_devices == 6:
 			self.name = 'Unifying Receiver'