[PATCH 4.4 128/160] mach64: fix image corruption due to reading accelerator registers

4.4-stable review patch. If anyone has any objections, please let me know. -- From: Mikulas Patocka commit c09bcc91bb94ed91f1391bffcbe294963d605732 upstream. Reading the registers without waiting for engine idle returns unpredictable values. These unpredictable values result

[PATCH 4.4 128/160] mach64: fix image corruption due to reading accelerator registers

4.4-stable review patch. If anyone has any objections, please let me know. -- From: Mikulas Patocka commit c09bcc91bb94ed91f1391bffcbe294963d605732 upstream. Reading the registers without waiting for engine idle returns unpredictable values. These unpredictable values result