On Thu, 12 Oct 2017 13:35:17 +0200 Peter Rosin <peda@xxxxxxxxxx> wrote: > Hi! > > I have encountered an "interesting" bug. It silently corrupts data > and is generally nasty... > > On an I2C bus, driven by the at91 driver and DMA (an Atmel > sama5d31 chip), I have an 256 byte eeprom (NXP SE97BTP). I'm using > Linux v4.13. If your force the transfer to PIO does it behave ? Does the controller in fact need to siwtch to PIO for SMBUS ? Alan