Re: [PATCH v4 4/8] of: property: Add fw_devlink support for optional properties

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Fri, Feb 05, 2021 at 02:26:40PM -0800, Saravana Kannan wrote:
> Not all DT bindings are mandatory bindings. Add support for optional DT
> bindings and mark iommus, iommu-map, dmas as optional DT bindings.

I don't think we can say these are optional or not. It's got to be a 
driver decision somehow.

For example, if IOMMU is optional, what happens with this sequence:

driver probes without IOMMU
driver calls dma_map_?()
IOMMU driver probes
h/w accesses DMA buffer --> BOOM!



[Index of Archives]     [Linux IBM ACPI]     [Linux Power Management]     [Linux Kernel]     [Linux Laptop]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Samba]     [Video 4 Linux]     [Device Mapper]     [Linux Resources]

  Powered by Linux