On Thu, 17 Dec 2020 19:16:58 -0800 Saravana Kannan wrote:
> > > As discussed in LPC 2020, cyclic dependencies in firmware that couldn't > be broken using logic was one of the last remaining reasons > fw_devlink=on couldn't be set by default. > > This series changes fw_devlink so that when a cyclic dependency is found > in firmware, the links between those devices fallback to permissive mode > behavior. This way, the rest of the system still benefits from > fw_devlink, but the ambiguous cases fallback to permissive mode. > > Setting fw_devlink=on by default brings a bunch of benefits (currently, > only for systems with device tree firmware): > * Significantly cuts down deferred probes. > * Device probe is effectively attempted in graph order. > * Makes it much easier to load drivers as modules without having to > worry about functional dependencies between modules (depmod is still > needed for symbol dependencies). > > Greg/Rafael, > > Can we get this pulled into 5.11-rc1 or -rc2 soon please? I expect to > see some issues due to device drivers that aren't following best > practices (they don't expose the device to driver core). Want to > identify those early on and try to have them fixed before 5.11 release. > See [1] for an example of such a case. > > If we do end up have to revert anything, it'll just be Patch 5/5 (a one > liner). > > Marc, > > You had hit issues with fw_devlink=on before on some of your systems. > Want to give this a shot? > > Jisheng, > > Want to fix up one of those gpio drivers you were having problems with? > Hi Saravana, I didn't send fix for the gpio-dwapb.c in last development window, so can send patch once 5.11-rc1 is released. thanks
