The PE Reset State "0" obtained from RTAS calls ibm_read_slot_reset_[state|state2] indicates that the Reset is deactivated and the PE is not in the MMIO Stopped or DMA Stopped state.
With PE Reset State "0", the MMIO and DMA is allowed for the PE. The function pseries_eeh_get_state() is currently not indicating that to the caller because of which the drivers are unable to resume the MMIO and DMA activity. The patch fixes that by reflecting what is actually allowed.
Fixes: 00ba05a12b3c ("powerpc/pseries: Cleanup on pseries_eeh_get_state()") Cc: stable@vger.kernel.org Signed-off-by: Narayana Murty N nnmlinux@linux.ibm.com
--- Changelog: V1:https://lore.kernel.org/all/20241107042027.338065-1-nnmlinux@linux.ibm.com/ --added Fixes tag for "powerpc/pseries: Cleanup on pseries_eeh_get_state()". V2:https://lore.kernel.org/stable/20241212075044.10563-1-nnmlinux%40linux.ibm.c... --Updated the patch description to include it in the stable kernel tree. --- arch/powerpc/platforms/pseries/eeh_pseries.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/eeh_pseries.c b/arch/powerpc/platforms/pseries/eeh_pseries.c index 1893f66371fa..b12ef382fec7 100644 --- a/arch/powerpc/platforms/pseries/eeh_pseries.c +++ b/arch/powerpc/platforms/pseries/eeh_pseries.c @@ -580,8 +580,10 @@ static int pseries_eeh_get_state(struct eeh_pe *pe, int *delay)
switch(rets[0]) { case 0: - result = EEH_STATE_MMIO_ACTIVE | - EEH_STATE_DMA_ACTIVE; + result = EEH_STATE_MMIO_ACTIVE | + EEH_STATE_DMA_ACTIVE | + EEH_STATE_MMIO_ENABLED | + EEH_STATE_DMA_ENABLED; break; case 1: result = EEH_STATE_RESET_ACTIVE |