On 28.03.2021 08:31:14, Belisko Marek wrote: > I have a beaglebone based board and I'm performing some tests. As far as I know the beagle bone boards all have d_can controllers, not m_can. > 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). That's going into the right direction. Please try the lastest net-next/master, which includes this merge: https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/commit/?id=9c0ee085c49c11381dcbd609ea85e902eab88a92 regards, Marc -- Pengutronix e.K. | Marc Kleine-Budde | Embedded Linux | https://www.pengutronix.de | Vertretung West/Dortmund | Phone: +49-231-2826-924 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
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