On Tuesday, April 29, 2014 12:23:54 AM Srivatsa S. Bhat wrote: > > Hi, > > Meelis Roos reported hangs during boot in the longhaul cpufreq driver, after > commit 12478cf0c55 (cpufreq: Make sure frequency transitions are serialized). > The root-cause of this issue is the extra invocation of the > cpufreq_freq_transition_begin() and cpufreq_freq_transition_end() APIs in the > longhaul driver. I found similar issues in the powernow-k6 and powernow-k7 > drivers as well. This patchset fixes the issue in all the 3 drivers and also > adds a debug infrastructure to catch such issues easily. > > Patches 1-4 fix the regression in longhaul, powernow-k6 and powernow-k7 > drivers. (Patch 2 fixes a different bug in powernow-k6, and it is kept as a > separate patch instead of merging it with patch 3, because I felt that it was > a bit subtle and needed attention in a separate patch). > > Patch 5 adds a debug infrastructure to the cpufreq core to catch such problems > more easily in the future. I've queued up patches [1-4/5] for 3.15, the last one I need to have another look at tomorrow. BTW, when you fix regressions, please always add a Fixes: tag to the changelog. Thanks! -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center. -- To unsubscribe from this list: send the line "unsubscribe cpufreq" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
