In addition to being a watchdog, hpwdt participates in error containment on ProLiant systems. On legacy platforms, Gen 9 and earlier, Fatal IO errors would be signaled as an IO CHECK NMI with expectation that hpwdt would be present to receive the NMI and crash the systems thus containing the error. A problem was that hwpdt did not discriminate enough in accepting NMIs. This could lead to problems if an NMI generated for another subsystem was not claimed by that subsystem and became UNKNOWN and was claimed by hpwdt. Application profiling was such an example. Although the known profiling issue was fixed, hpwdt should avoid claiming NMI not intended for it. In iLO 5 time frame, checks were added to make hpwdt more selective in claiming NMI. This patchset cleans up the checks and enables them for future versions of iLO. Updates from V1 --------------- Refactor second patch into two creating a three patch series. Update and clarify patch documentation. Jerry Hoemann (3): watchdog/hpwdt: Only claim UNKNOWN NMI if from iLO watchdog/hpwdt: Remove redundant test. watchdog/hpwdt: Remove unused variable drivers/watchdog/hpwdt.c | 9 +-------- 1 file changed, 1 insertion(+), 8 deletions(-) -- 2.41.0
