Hi David, On Fri, Jun 28, 2024 at 10:27:28AM -0500, David Lechner wrote: > Hi Oleksij and Marc, > > I'm supposed to be on vacation so I didn't look into this deeply yet > but I can see what is happening here. > > spi_mux_transfer_one_message() is calling spi_async() which is calling > __spi_optimize_message() on an already optimized message. > > Then it also calls __spi_unoptimize_message() which tries to release > resources. But this fails because the spi-mux driver has swapped > out the pointer to the device in the SPI message. This causes the > wrong ctlr to be passed to spi_res_release(), causing the crash. > > I don't know if a proper fix could be quite so simple, but here is > something you could try (untested): Thx! I'll test it at Monday. Regards, Oleksij -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
