Synchronize access to eeh_pe.
Signed-off-by: Sam Bobroff <sbobr...@linux.ibm.com>
---
arch/powerpc/kernel/eeh.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/eeh.c b/arch/powerpc/kernel/eeh.c
index 171be70b34d8..cba16ca0694a 100644
--- a/arch/powerpc/kernel/eeh.c
+++ b/arch/powerpc/kernel/eeh.c
@@ -1689,6 +1689,7 @@ int eeh_pe_get_state(struct eeh_pe *pe)
{
int result, ret = 0;
bool rst_active, dma_en, mmio_en;
+ unsigned long flags;
/* Existing PE ? */
if (!pe)
@@ -1703,10 +1704,14 @@ int eeh_pe_get_state(struct eeh_pe *pe)
* unavailable so that the error recovery on the guest is suspended
* until the recovery completes on the host.
*/
+ eeh_lock_pes(&flags);
if (pe->parent &&
!(pe->state & EEH_PE_REMOVED) &&
- (pe->parent->state & (EEH_PE_ISOLATED | EEH_PE_RECOVERING)))
+ (pe->parent->state & (EEH_PE_ISOLATED | EEH_PE_RECOVERING))) {
+ eeh_unlock_pes(flags);
return EEH_PE_STATE_UNAVAIL;
+ }
+ eeh_unlock_pes(flags);
result = eeh_ops->get_state(pe, NULL);
rst_active = !!(result & EEH_STATE_RESET_ACTIVE);
--
2.22.0.216.g00a2a96fc9
