On 18/12/2021 11.51, Alex Henrie wrote: > On Fri, 17 Dec 2021 16:41:05 +0900 > Hector Martin <marcan@xxxxxxxxx> wrote: > >> On 17/12/2021 09.31, Alex Henrie wrote: >>> I am having a similar problem, but unfortunately this patch doesn't >>> work for me (I get the error "BIOS uses SMBus unsafely"). Would it be >>> acceptable to add a module parameter to allow access to the SMBus, even >>> if the BIOS is using it? I realize that this is not a good idea in >>> general, but I believe it is safe in my particular case, and I don't >>> see any other way to solve my problem. >> >> How is this safe in your case? If the BIOS is using SMBus without >> locking it, and may do so at any time, then there's no way to safely use >> it from Linux. > > The BIOS appears to access the SMBus during the first few minutes after > boot, and then it stops using it. So "safe" may not be the right word, > but in my case, it seems to work OK to use the SMBus as long as the > uptime is greater than a few minutes. > > -Alex > Linux will probe the SMBus on startup, so that still seems like a rather fragile situation. You'd have to blacklist the module and load it separately a few minutes after boot, or something like that... -- Hector Martin (marcan@xxxxxxxxx) Public Key: https://mrcn.st/pub
