Hi, I have a beaglebone based board and I'm performing some tests. I discovered that when set bitrate to 500k during replaying can file from PC to board ip detect 4-5 error/overrun frames. When comparing the original file with received one few lines in candump are missing. When decreased can speed to 125KB replaying the same file no error/overruns are detected and files are the same. I'm not can expert thus I'm asking for some advice on how to debug such phenomena. I'm using mainline 4.12 kernel which shows this symptom. I compared changes with the latest mainline kernel and there are few patches only which seems can influence can behavior (others are only cosmetical). I took : 3cb3eaac52c0f145d895f4b6c22834d5f02b8569 - can: c_can: c_can_poll(): only read status register after status IRQ 23c5a9488f076bab336177cd1d1a366bd8ddf087 - can: c_can: D_CAN: c_can_chip_config(): perform a sofware reset on open 6f12001ad5e79d0a0b08c599731d45c34cafd376 - can: c_can: C_CAN: add bus recovery events I know most of the answers for such issues is to try latest kernel (i'm in process trying 5.10). Thanks and BR, marek -- as simple and primitive as possible ------------------------------------------------- Marek Belisko - OPEN-NANDRA Freelance Developer Ruska Nova Ves 219 | Presov, 08005 Slovak Republic Tel: +421 915 052 184 skype: marekwhite twitter: #opennandra web: http://open-nandra.com
