Possible issue in dma_direct_supported

["Kanert, Achim" <Achim.Kanert@xxxxxxxxxxxxxx>]

Hi,

I may have found an issue in https://elixir.bootlin.com/linux/v6.3.2/source/kernel/dma/direct.c#L579 the comparisson in line 589 is true
for all masks >= 32 bits. So if a driver tries to set a mask of 64 bit, and the system only supports 32 the mask is set to 64.
I discoverd this on an arm64 system which only supports 32-bit DMA for PCIe cards.

Is my assumption correct?

Regards,
Achim Kanert