вт, 9 черв. 2026 р. о 22:17 Andy Shevchenko <[email protected]> пише: > > On Sat, Jun 06, 2026 at 07:57:34AM +0300, Svyatoslav Ryhel wrote: > > Missing coherent_dma_mask assigning triggers the following warning in > > dmesg: > > > > [ 3.287872] platform lm3533-backlight.0: DMA mask not set > > > > Since this warning might be elevated to an error in the future, set > > coherent_dma_mask to zero because both the core and cells do not utilize > > DMA. > > Hmm... I am not sure about this. The entire kernel has only two drivers that > do that, and thanks to their commit messages one of them pointed out to the > commit from 2018. So, if no other devices suffer from this, I think it has to > be a better way of achieving the same. >
If mfd framework warns that DMA mask is not set then this must be addressed. Why then there is such warning at the first place if mask can be just skipped. Then warning would be just a debug message. What is warning today can become error tomorrow. > -- > With Best Regards, > Andy Shevchenko > >
