[PATCH RFC 12/15] powerpc/eeh: Sync eeh_pe_get_state()
From: Sam Bobroff <hidden>
Date: 2019-10-02 06:19:26
Subsystem:
linux for powerpc (32-bit and 64-bit), pci enhanced error handling (eeh) for powerpc, the rest · Maintainers:
Madhavan Srinivasan, Mahesh J Salgaonkar, Linus Torvalds
Synchronize access to eeh_pe. Signed-off-by: Sam Bobroff <redacted> --- 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