[PATCH 5/6] powerpc/powernv: OPAL dump support standardise OPAL_BUSY delays

[Nicholas Piggin]

Convert to using the standard delay poll/delay form.

The dump code:

- Did not previously delay or sleep in the OPAL_BUSY case.
- Used a 20ms sleep.

Signed-off-by: Nicholas Piggin <npig...@gmail.com>
---
 arch/powerpc/platforms/powernv/opal-dump.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/powernv/opal-dump.c 
b/arch/powerpc/platforms/powernv/opal-dump.c
index 0dc8fa4e0af2..603c4ffdb45c 100644
--- a/arch/powerpc/platforms/powernv/opal-dump.c
+++ b/arch/powerpc/platforms/powernv/opal-dump.c
@@ -264,8 +264,10 @@ static int64_t dump_read_data(struct dump_obj *dump)
        while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) {
                rc = opal_dump_read(dump->id, addr);
                if (rc == OPAL_BUSY_EVENT) {
+                       msleep(OPAL_BUSY_DELAY_MS);
                        opal_poll_events(NULL);
-                       msleep(20);
+               } else if (rc == OPAL_BUSY) {
+                       msleep(OPAL_BUSY_DELAY_MS);
                }
        }
 
-- 
2.16.3