linux-kernel - [PATCH] powerpc/pseries/eeh: Fix get PE state translation

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Message-ID: <20241107042027.338065-1-nnmlinux@linux.ibm.com>
Date: Wed,  6 Nov 2024 22:20:27 -0600
From: Narayana Murty N <nnmlinux@...ux.ibm.com>
To: linuxppc-dev@...ts.ozlabs.org, mpe@...erman.id.au,
        linux-kernel@...r.kernel.org
Cc: mahesh@...ux.ibm.com, oohall@...il.com, npiggin@...il.com,
        christophe.leroy@...roup.eu, maddy@...ux.ibm.com, naveen@...nel.org,
        vaibhav@...ux.ibm.com, ganeshgr@...ux.ibm.com, sbhat@...ux.ibm.com
Subject: [PATCH] powerpc/pseries/eeh: Fix get PE state translation

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.

Signed-off-by: Narayana Murty N <nnmlinux@...ux.ibm.com>
---
 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 |
-- 
2.45.2