Hi Wolfram, Just looking to get up to date info on whether we need to be careful with cachelines on buffers passed to i2c function calls or not. i.e. do they need to DMA safe buffers. I have it in the back of my head somewhere that i2c insisted that if necessary this was sorted by the i2c master drivers, but I suspect I am completely wrong. There are 'lots' of drivers out there that aren't taking care of this. We have traditionally been much better with SPI where there were explicit warnings about this. Anyhow, could you clarify the situation? Even if we audited existing master drivers to check we were fine, if it's not coming from you the chances are another one would sneak in sometime in the future which does need dma safe buffers. Certainly a superficial glance suggests that the at91 i2c master is mapping these directly as DMA buffers. Anyhow, what I'm really looking for is a quick email that I can point people at in future ;) or a reference to one somewhere else. Thanks, Jonathan -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
