On 29/08/21 00:26, Arnd Bergmann wrote:
The documentation was updated 11 years ago to only describe the modern
linux/dma-mapping.h interfaces and mark the old bus-specific ones as
no longer recommended, see 216bf58f4092 ("Documentation: convert
PCI-DMA-mapping.txt to use the generic DMA API").
Thanks, Arnd. That's exactly the kind of reference I was asking about.
And of course, a thanks goes to Christophe as well for drawing my
attention to this issue. A bit surprising it didn't happen back in 2013,
when the driver was included in the kernel. Or possibly in 2014, when it
went out of staging.
As for this patch set, three out of four patches make modifications in
functions that should be deleted altogether. Their only purpose is to
wrap DMA-related calls made by the core driver, so that the pci_* API is
used for PCI devices, and the dma_* API otherwise. As it turns out, this
was a lot of nonsense code from day one.
I'll prepare a patch that removes all this.
Thanks again,
Eli
