[Pdbg] [PATCH] libpdbg/p9chip: fix ram_is_setup

[Nicholas Piggin]

Commit b825a47717 removed ram_is_setup unintentionally. Add it back.

Ramming still doesn't really work because special wakeup release
between stop and ram commands causes quiesced state to be lost.

Signed-off-by: Nicholas Piggin <npiggin at gmail.com>
---
 libpdbg/p9chip.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/libpdbg/p9chip.c b/libpdbg/p9chip.c
index c5de3bb..c43b0cc 100644
--- a/libpdbg/p9chip.c
+++ b/libpdbg/p9chip.c
@@ -217,6 +217,9 @@ static int p9_ram_setup(struct thread *thread)
 	struct core *chip = target_to_core(thread->target.parent);
 	uint64_t value;
 
+	if (thread->ram_is_setup)
+		return 1;
+
 	/* We can only ram a thread if all the threads on the core/chip are
 	 * quiesced */
 	dt_for_each_compatible(&chip->target, target, "ibm,power9-thread") {
@@ -256,6 +259,8 @@ static int p9_ram_setup(struct thread *thread)
 
 	thread->status = p9_get_thread_status(thread);
 
+	thread->ram_is_setup = true;
+
 	return 0;
 
 out_fail:
@@ -362,6 +367,9 @@ static int p9_ram_instruction(struct thread *thread, uint64_t opcode, uint64_t *
 
 static int p9_ram_destroy(struct thread *thread)
 {
+	if (!thread->ram_is_setup)
+		return 1;
+
 	/* Disable ram mode */
 	CHECK_ERR(thread_write(thread, P9_RAM_MODEREG, 0));
 
@@ -370,6 +378,8 @@ static int p9_ram_destroy(struct thread *thread)
 
 	thread->status = p9_get_thread_status(thread);
 
+	thread->ram_is_setup = false;
+
 	return 0;
 }
 
-- 
2.17.0