[PATCH v2 7/9] powerpc/powernv: OPAL dump support standardise OPAL_BUSY delays

[Nicholas Piggin <npiggin@gmail.com>]

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.

Cc: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
 arch/powerpc/platforms/powernv/opal-dump.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/platforms/powernv/opal-dump.c b/arch/powerpc/platforms/powernv/opal-dump.c
index 0dc8fa4e0af2..4ab749ceafc2 100644
--- a/arch/powerpc/platforms/powernv/opal-dump.c
+++ b/arch/powerpc/platforms/powernv/opal-dump.c
@@ -260,12 +260,14 @@ static int64_t dump_read_data(struct dump_obj *dump)
 	addr = __pa(list);
 
 	/* Fetch data */
-	rc = OPAL_BUSY_EVENT;
+	rc = OPAL_BUSY;
 	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);
 		}
 	}
 
-- 
2.17.0